TCP Santa Cruz is a new implementation of TCP congestion control and error recovery designed to work better than TCP Reno or Tahoe over networks with heterogeneous transmission media. It uses estimates of the relative delay between packets on the forward path, rather than round-trip time estimates, to detect congestion early. It can identify the direction of congestion to isolate the forward throughput from reverse path events. Simulation experiments show TCP Santa Cruz achieves significantly higher throughput, smaller delays, and delay variances than TCP Reno and Vegas.
"Performance Evaluation and Comparison of Westwood+, New Reno and Vegas TCP ...losalamos
Luigi A. Grieco, Saverio Mascolo.
ACM CCR, Vol.34 No.2, April 2004.
This article aims at evaluating a comparison between three TCP congestion control algorithms. A really interesting reading.
The performance of wireless ad hoc networks is impacted significantly by the way TCP reacts to lost packets. TCP was designed specifically for wired, reliable networks; thus, any packet loss is attributed to congestion in the network. This assumption does not hold in wireless networks as most packet loss is due to link failure. In our research we analyzed several implementations of TCP, including TCP Vegas, TCP Feedback, and SACK TCP, by measuring throughput, retransmissions, and duplicate acknowledgements through simulation with ns-2. We discovered that TCP throughput is related to the number of hops in the path, and thus depends on the performance of the underlying routing protocol, which was DSR in our research.
The document discusses challenges with using TCP in mobile ad hoc networks (MANETs) and evaluates potential solutions. Specifically, it finds that:
1) TCP performs poorly in MANETs due to high packet loss from route failures and wireless errors, which TCP misinterprets as congestion.
2) TCP variants like Westwood and Jersey that more accurately estimate bandwidth perform better but are not sufficient.
3) A new transport protocol like ATP that is rate-based rather than window-based and leverages intermediate nodes may better address MANET issues.
IJCER (www.ijceronline.com) International Journal of computational Engineerin...ijceronline
1) The document discusses improving transport layer performance in data communication networks by delaying transmissions. It proposes a Queue Length Based Pacing (QLBP) algorithm that delays packets based on the length of the local packet buffer to reduce burstiness.
2) It reviews several related works on using pacing, small buffers, and forward error correction to improve performance in small buffer networks and optical packet switched networks.
3) The document analyzes problems like packet loss from bit errors and congestion that degrade transport layer performance, and how QLBP aims to reduce packet loss through traffic pacing.
This document analyzes and compares the congestion window behavior of three TCP variants (HS-TCP, Full-TCP, and TCP-Linux) over a Long Term Evolution (LTE) network model using network simulation. It first reviews related work that has analyzed TCP performance but with assumptions like equal window sizes or only considering uploads/downloads. The document then describes the topology and parameters used to simulate the LTE network in NS-2. Simulation results are presented that analyze the slow-start and congestion avoidance phases of each TCP variant individually, and also compare their congestion window behavior over the full simulation period.
This document summarizes key concepts from Chapter 3 of the textbook on transport layer protocols:
1. The transport layer provides logical communication between processes running on different hosts, abstracting the underlying network infrastructure. It multiplexes data from multiple sockets and demultiplexes received data to the appropriate socket.
2. UDP and TCP are the main transport protocols in the Internet. UDP is connectionless while TCP provides reliable, connection-oriented data transfer using sequence numbers, acknowledgments, and congestion control.
3. TCP uses congestion control including a congestion window, additive increase/multiplicative decrease, and slow start to dynamically control the sender's transmission rate based on detected packet loss as a signal of
This technical whitepaper compares Aspera FASP, a high-speed transport protocol, to alternative TCP-based and UDP-based file transfer technologies. It finds that while TCP and high-speed TCP variants can improve throughput over standard TCP in low-loss networks, their performance degrades significantly in wide-area networks with higher latency and packet loss. UDP-based solutions also struggle to achieve high throughput and efficiency across different network conditions due to poor congestion control. In contrast, Aspera FASP is able to achieve maximum throughput that is independent of network characteristics like latency and packet loss, making it optimal for reliable, high-speed transfer of large files over IP networks.
A dynamic performance-based_flow_controlingenioustech
Dear Students
Ingenious techno Solution offers an expertise guidance on you Final Year IEEE & Non- IEEE Projects on the following domain
JAVA
.NET
EMBEDDED SYSTEMS
ROBOTICS
MECHANICAL
MATLAB etc
For further details contact us:
enquiry@ingenioustech.in
044-42046028 or 8428302179.
Ingenious Techno Solution
#241/85, 4th floor
Rangarajapuram main road,
Kodambakkam (Power House)
http://www.ingenioustech.in/
"Performance Evaluation and Comparison of Westwood+, New Reno and Vegas TCP ...losalamos
Luigi A. Grieco, Saverio Mascolo.
ACM CCR, Vol.34 No.2, April 2004.
This article aims at evaluating a comparison between three TCP congestion control algorithms. A really interesting reading.
The performance of wireless ad hoc networks is impacted significantly by the way TCP reacts to lost packets. TCP was designed specifically for wired, reliable networks; thus, any packet loss is attributed to congestion in the network. This assumption does not hold in wireless networks as most packet loss is due to link failure. In our research we analyzed several implementations of TCP, including TCP Vegas, TCP Feedback, and SACK TCP, by measuring throughput, retransmissions, and duplicate acknowledgements through simulation with ns-2. We discovered that TCP throughput is related to the number of hops in the path, and thus depends on the performance of the underlying routing protocol, which was DSR in our research.
The document discusses challenges with using TCP in mobile ad hoc networks (MANETs) and evaluates potential solutions. Specifically, it finds that:
1) TCP performs poorly in MANETs due to high packet loss from route failures and wireless errors, which TCP misinterprets as congestion.
2) TCP variants like Westwood and Jersey that more accurately estimate bandwidth perform better but are not sufficient.
3) A new transport protocol like ATP that is rate-based rather than window-based and leverages intermediate nodes may better address MANET issues.
IJCER (www.ijceronline.com) International Journal of computational Engineerin...ijceronline
1) The document discusses improving transport layer performance in data communication networks by delaying transmissions. It proposes a Queue Length Based Pacing (QLBP) algorithm that delays packets based on the length of the local packet buffer to reduce burstiness.
2) It reviews several related works on using pacing, small buffers, and forward error correction to improve performance in small buffer networks and optical packet switched networks.
3) The document analyzes problems like packet loss from bit errors and congestion that degrade transport layer performance, and how QLBP aims to reduce packet loss through traffic pacing.
This document analyzes and compares the congestion window behavior of three TCP variants (HS-TCP, Full-TCP, and TCP-Linux) over a Long Term Evolution (LTE) network model using network simulation. It first reviews related work that has analyzed TCP performance but with assumptions like equal window sizes or only considering uploads/downloads. The document then describes the topology and parameters used to simulate the LTE network in NS-2. Simulation results are presented that analyze the slow-start and congestion avoidance phases of each TCP variant individually, and also compare their congestion window behavior over the full simulation period.
This document summarizes key concepts from Chapter 3 of the textbook on transport layer protocols:
1. The transport layer provides logical communication between processes running on different hosts, abstracting the underlying network infrastructure. It multiplexes data from multiple sockets and demultiplexes received data to the appropriate socket.
2. UDP and TCP are the main transport protocols in the Internet. UDP is connectionless while TCP provides reliable, connection-oriented data transfer using sequence numbers, acknowledgments, and congestion control.
3. TCP uses congestion control including a congestion window, additive increase/multiplicative decrease, and slow start to dynamically control the sender's transmission rate based on detected packet loss as a signal of
This technical whitepaper compares Aspera FASP, a high-speed transport protocol, to alternative TCP-based and UDP-based file transfer technologies. It finds that while TCP and high-speed TCP variants can improve throughput over standard TCP in low-loss networks, their performance degrades significantly in wide-area networks with higher latency and packet loss. UDP-based solutions also struggle to achieve high throughput and efficiency across different network conditions due to poor congestion control. In contrast, Aspera FASP is able to achieve maximum throughput that is independent of network characteristics like latency and packet loss, making it optimal for reliable, high-speed transfer of large files over IP networks.
A dynamic performance-based_flow_controlingenioustech
Dear Students
Ingenious techno Solution offers an expertise guidance on you Final Year IEEE & Non- IEEE Projects on the following domain
JAVA
.NET
EMBEDDED SYSTEMS
ROBOTICS
MECHANICAL
MATLAB etc
For further details contact us:
enquiry@ingenioustech.in
044-42046028 or 8428302179.
Ingenious Techno Solution
#241/85, 4th floor
Rangarajapuram main road,
Kodambakkam (Power House)
http://www.ingenioustech.in/
Packet losses at IP network are common behavior at
the time of congestion. The TCP traffic is explained as in
terms of load and capacity. The load should be measured as
number of sender actively competes for a bottleneck link and
the capacity as the total network buffering available to those
senders. Though there are many congestion mechanism
already in practice like congestion window, slow start,
congestion avoidance, fast transmit but still we see erratic
behavior when there is a large traffic. The TCP protocol that
controls sources send rates degrades rapidly if the network
cannot store at least a few packets per active connection. Thus
the amount of router buffer space required for good
performance scales with the number of active connections
and the bandwidth utilization by each active connections. As
in the current practice, the buffer space does not scale in this
way and router drops the packet without looking at bandwidth
utilization of each connections. The result is global
synchronization and phase effect as well as packet from the
unlucky sender will be frequently dropped. The simultaneous
requirements of low queuing delay and of large buffer
memories for large numbers of connections pose a problem.
Routers should enforce a dropping policy by proportional to
the bandwidth utilization by each active connection. Router
will provision the buffering mechanism when processing slows
down. This study explains the existing problem with drop-tail
and RED routers and proposes the new mechanism to predict
the effective bandwidth utilization of the clients depending
on their history of utilization and drop the packet in different
pattern after analyzing the network bandwidth utilization at
each specific interval of time
TCP INCAST AVOIDANCE BASED ON CONNECTION SERIALIZATION IN DATA CENTER NETWORKSIJCNCJournal
In distributed file systems, a well-known congestion collapse called TCP incast (Incast briefly) occurs
because many servers almost simultaneously send data to the same client and then many packets overflow
the port buffer of the link connecting to the client. Incast leads to throughput degradation in the network. In
this paper, we propose three methods to avoid Incast based on the fact that the bandwidth-delay product is
small in current data center networks. The first method is a method which completely serializes connection
establishments. By the serialization, the number of packets in the port buffer becomes very small, which
leads to Incast avoidance. The second and third methods are methods which overlap the slow start period
of the next connection with the current established connection to improve throughput in the first method.
Numerical results from extensive simulation runs show the effectiveness of our three proposed methods.
Analytical Research of TCP Variants in Terms of Maximum ThroughputIJLT EMAS
This paper is comparative, throughput analysis, for
the TCP variants as for New Reno, Westwood & High Speed,
and it analyzes the outcomes in simulated environment for NS -3
(version 3.25) simulator with reference to multiple varying
network parameters that includes network simulation time,
router bandwidth, varying traffic source counts to observe which
is one of the best TCP variant in different scenarios. Analysis
was done using dumbbell topology to figure out the comparative
maximum throughput of TCP variants. The analysis gives result
as TCP Variant “NewReno” is good when low bandwidth is used,
while TCP Variant “HighS peed” is good in terms of using large
bandwidths in comparison to Westwood. Network traffic flow
was observed in NetAnim tool.
Chorus is a novel broadcast protocol that improves the efficiency and scalability of wireless broadcast using self-interference cancellation at the MAC/PHY layers. It allows packet collisions and resolves them using symbol-level interference cancellation and iterative decoding. This collision-tolerant mechanism significantly improves spatial reuse and transmission diversity. Chorus also includes a cognitive MAC sensing and scheduling scheme that further facilitates these advantages, resulting in asymptotic broadcast delay proportional to the network radius. Evaluation shows Chorus provides significantly better performance than CSMA/CA-based protocols in terms of scalability, reliability, delay, and other metrics across various network scenarios.
International Journal of Engineering Research and Applications (IJERA) is a team of researchers not publication services or private publications running the journals for monetary benefits, we are association of scientists and academia who focus only on supporting authors who want to publish their work. The articles published in our journal can be accessed online, all the articles will be archived for real time access.
Our journal system primarily aims to bring out the research talent and the works done by sciaentists, academia, engineers, practitioners, scholars, post graduate students of engineering and science. This journal aims to cover the scientific research in a broader sense and not publishing a niche area of research facilitating researchers from various verticals to publish their papers. It is also aimed to provide a platform for the researchers to publish in a shorter of time, enabling them to continue further All articles published are freely available to scientific researchers in the Government agencies,educators and the general public. We are taking serious efforts to promote our journal across the globe in various ways, we are sure that our journal will act as a scientific platform for all researchers to publish their works online.
This paper proposes a new end-to-end congestion control protocol called ACP that is designed for high bandwidth-delay product networks. ACP aims to achieve high link utilization, fairness among flows, and fast convergence. It does this by estimating the bottleneck queue size upon detecting congestion and decreasing the congestion window by exactly the amount needed to empty the queue. It also uses a "fairness ratio" metric to determine window increases to ensure convergence to a fair share of bandwidth among flows. The paper argues that existing protocols cannot achieve high utilization and fairness due to their inability to accurately measure link load. It claims ACP addresses this through a new congestion window control approach combining queue size estimation and a fairness measure.
1. The document analyzes TCP Vegas congestion control in Linux 2.6.1. TCP Vegas monitors the difference between expected sending rate and actual sending rate to estimate network congestion and adjust the congestion window size accordingly.
2. The key aspects of TCP Vegas analyzed are delay, fairness, and loss properties. TCP Vegas aims to keep a small, stable number of packets buffered to minimize delay while achieving weighted proportional fairness between connections. It avoids packet loss by carefully extracting congestion information from round-trip times.
3. Analysis shows that in Linux implementation, TCP Vegas increases and decreases the congestion window cautiously in response to traffic, avoiding sharp increases in window size that could lead to congestion like in TCP
A COMPARISON OF CONGESTION CONTROL VARIANTS OF TCP IN REACTIVE ROUTING PROTOC...ijcsit
A widely used TCP protocol is originally developed for wired networks. It has many variants to detect and
control congestion in the network. However, Congestion control in all TCP variants does not show similar
performance in MANET as in wired network because of the fault detection of congestion. In this paper, we
do a performance comparison between TCP variants NEW RENO, SACK and Vegas in AODV and DSR
reactive (On-Demand) routing protocols. Network traffic between nodes is provided by using File Transfer
Protocol (FTP) application. Multiple scenarios are created and the average values of each performance
parameter are used to evaluate the performance. The results show that TCP variants perform better in
terms of throughput and Packet drop with DSR routing protocol compared with AODV routing protocol.
TCP variants show a lower Jitter in AODV compared with DSR.
The document discusses data link control and various related topics:
1. Link throughput is reduced by factors like frame overheads, propagation delay, acknowledgements, and retransmissions. HDLC and PPP are protocols that use frames for data transmission.
2. Flow control uses window mechanisms to regulate the maximum number of unacknowledged frames sent to prevent overflow. This affects throughput.
3. Link management procedures are needed to handle link and node failures and ensure frames are delivered properly.
Mobile stations must share a single channel for communication, which can lead to collisions if multiple stations transmit simultaneously. Several protocols have been developed to manage access to the shared channel, including ALOHA, CSMA, and their variations. CSMA/CA with RTS/CTS is commonly used in wireless networks as it helps avoid collisions and resolve the hidden terminal problem.
This document discusses various transport layer protocols for mobile networks. It begins with an overview of TCP and UDP, and then describes several strategies for improving TCP performance over mobile networks, including indirect TCP (I-TCP), snooping TCP, and Mobile TCP. It also discusses congestion control strategies like slow start and fast retransmit. Overall, the document analyzes how TCP can be optimized through techniques like connection splitting, buffering, and selective retransmission to better accommodate the characteristics of wireless networks.
avoiding retransmissions using random coding scheme or fountain code schemeIJAEMSJORNAL
In a perfect world, the throughput of a Multipath TCP (MPTCP) association ought to be as high as that of different disjoint single-way TCP streams. In actuality, the throughput of MPTCP is far lower than anticipated. In this paper, we lead angeneral reproduction construct ponder in light of this peculiarity, and the outcomes show that a sub stream encountering high postponement and misfortune extremely influences the execution of other sub streams, in this manner turning into the half back of the MPTCP association and knowingly humiliating the total great put. To handle this issue, we propose Wellspring code-based Multipath TCP (FMTCP), which viably mitigates the negative effect of the heterogeneity of modified ways. FMTCP exploits the unintentional way of the wellspring code to adaptably transmit encoded images from the same or diverse information hinders over various sub streams. In addition, we plan an information portion calculation in view of the foreseen bundle arriving time and deciphering command to facilitate the transmissions of various sub streams. Quantitative reviews are given to demonstrate the advantage of FMTCP. We likewise assess the presentation of FMTCP through ns-2 recreations and exhibit that FMTCP beats IETF-MPTCP, a run of the mill MPTCP approach, when the ways have various misfortune and deferral as far as higher aggregate great put, bring down postponement, and jitter. Also, FMTCP acknowledges high security under sudden changes of way quality.
T/TCP is a protocol that aims to reduce the number of packets needed for transaction-style applications by allowing a client to open a connection, send data, and close the connection in a single packet. It utilizes a mechanism called TCP Accelerated Open (TAO) to bypass the standard 3-way TCP handshake. Testing showed T/TCP saved an average of 5 packets per transaction compared to TCP. However, the percentage savings decreased with larger data transfers as T/TCP is most beneficial for small transactions. While improving performance, T/TCP also introduced some security and operational issues that needed to be addressed for broader adoption.
Iaetsd an effective approach to eliminate tcp incastIaetsd Iaetsd
This document proposes an Incast Congestion Control for TCP (ICTCP) scheme to eliminate TCP incast collapse in datacenter environments. TCP incast collapse occurs when multiple synchronized servers send data to the same receiver in parallel, overwhelming the switch buffer and causing packet loss. ICTCP is a receiver-side approach that proactively adjusts the TCP receive window size of connections to control their aggregate burstiness and prevent switch buffer overflow before packet loss occurs. It estimates available bandwidth and uses this as a quota to coordinate receive window increases. For each connection, the receive window is adjusted based on the ratio of the difference between measured and expected throughput. This allows adaptive tuning of receive windows to meet sender throughput needs while avoiding congest
DOTNET 2013 IEEE MOBILECOMPUTING PROJECT Delay optimal broadcast for multihop...IEEEGLOBALSOFTTECHNOLOGIES
To Get any Project for CSE, IT ECE, EEE Contact Me @ 09849539085, 09966235788 or mail us - ieeefinalsemprojects@gmail.com-Visit Our Website: www.finalyearprojects.org
CoDel is a new active queue management algorithm that controls queue delay without requiring configuration. It uses the minimum packet sojourn time through the queue to distinguish good queueing from bad queueing that causes excessive delays. Simulation results show that CoDel adapts well to dynamically changing link rates and traffic loads, maintaining high utilization while keeping delays low. CoDel is suitable for deployment in routers and home gateways to help solve the problem of bufferbloat on the Internet.
Improvement of Congestion window and Link utilization of High Speed Protocols...IOSR Journals
This document summarizes a research paper that proposes using a k-nearest neighbors (k-NN) algorithm to help high-speed transport layer protocols like CUBIC better distinguish between packet drops due to network congestion versus other factors like noise. The k-NN algorithm would analyze patterns in packet drop history to classify new drops, helping protocols avoid unnecessary window size reductions when drops are not actually due to congestion. The document provides background on high-speed protocols, issues like underutilization from treating all drops as congestion, and how incorporating k-NN classification could improve protocols' performance in noisy network conditions.
The document discusses various transport layer protocols for mobile computing environments:
- Traditional TCP faces problems with high error rates and mobility-induced packet losses in wireless networks. It can lead to severe performance degradation.
- Indirect TCP segments the TCP connection and uses a specialized TCP for the wireless link, isolating wireless errors. But it loses end-to-end semantics.
- Snooping TCP buffers packets near the mobile host and performs local retransmissions transparently. But wireless errors can still propagate to the server.
- Mobile TCP splits the connection and uses different mechanisms on each segment. It chokes the sender window during disconnections to avoid retransmissions and slow starts. This maintains throughput during
This document presents an overview of computer network congestion and congestion control techniques. It defines congestion as occurring when too many packets are present in a network link, causing queues to overflow and packets to drop. It then discusses factors that can cause congestion as well as the costs. It outlines open-loop and closed-loop congestion control approaches. Specific algorithms covered include leaky bucket, token bucket, choke packets, hop-by-hop choke packets, and load shedding. The document concludes by noting the importance of efficient congestion control techniques with room for improvement.
The SWF file format is available as an open specification to create products and technology that implement the specification. SWF 9 introduced the ActionScript™ 3.0 language and virtual machine. The SWF 10 specification expands text capabilities with support for bidirectional text and complex scripts with the new DefineFont4 tag. The DefineBitsJPEG4 tag allows embedding JPEG images that have an alpha channel for opacity and also a smoothing filter. SWF 10 also adds support for the free and open-source Speex voice codec and for higher frequencies in the existing Nellymoser codec.
Este documento resume los principales mercados de exportación del Perú y la evolución de las exportaciones peruanas a Alemania. En 2014, los principales mercados de exportación del Perú fueron China, Estados Unidos, Suiza, Canadá y Brasil. Las exportaciones peruanas a Alemania han ido aumentando desde 2010, alcanzando US$ 1.9 mil millones en 2014. Los principales productos agropecuarios y agroindustriales exportados a Alemania incluyen uvas frescas, espárragos, aguacates y quinua.
Packet losses at IP network are common behavior at
the time of congestion. The TCP traffic is explained as in
terms of load and capacity. The load should be measured as
number of sender actively competes for a bottleneck link and
the capacity as the total network buffering available to those
senders. Though there are many congestion mechanism
already in practice like congestion window, slow start,
congestion avoidance, fast transmit but still we see erratic
behavior when there is a large traffic. The TCP protocol that
controls sources send rates degrades rapidly if the network
cannot store at least a few packets per active connection. Thus
the amount of router buffer space required for good
performance scales with the number of active connections
and the bandwidth utilization by each active connections. As
in the current practice, the buffer space does not scale in this
way and router drops the packet without looking at bandwidth
utilization of each connections. The result is global
synchronization and phase effect as well as packet from the
unlucky sender will be frequently dropped. The simultaneous
requirements of low queuing delay and of large buffer
memories for large numbers of connections pose a problem.
Routers should enforce a dropping policy by proportional to
the bandwidth utilization by each active connection. Router
will provision the buffering mechanism when processing slows
down. This study explains the existing problem with drop-tail
and RED routers and proposes the new mechanism to predict
the effective bandwidth utilization of the clients depending
on their history of utilization and drop the packet in different
pattern after analyzing the network bandwidth utilization at
each specific interval of time
TCP INCAST AVOIDANCE BASED ON CONNECTION SERIALIZATION IN DATA CENTER NETWORKSIJCNCJournal
In distributed file systems, a well-known congestion collapse called TCP incast (Incast briefly) occurs
because many servers almost simultaneously send data to the same client and then many packets overflow
the port buffer of the link connecting to the client. Incast leads to throughput degradation in the network. In
this paper, we propose three methods to avoid Incast based on the fact that the bandwidth-delay product is
small in current data center networks. The first method is a method which completely serializes connection
establishments. By the serialization, the number of packets in the port buffer becomes very small, which
leads to Incast avoidance. The second and third methods are methods which overlap the slow start period
of the next connection with the current established connection to improve throughput in the first method.
Numerical results from extensive simulation runs show the effectiveness of our three proposed methods.
Analytical Research of TCP Variants in Terms of Maximum ThroughputIJLT EMAS
This paper is comparative, throughput analysis, for
the TCP variants as for New Reno, Westwood & High Speed,
and it analyzes the outcomes in simulated environment for NS -3
(version 3.25) simulator with reference to multiple varying
network parameters that includes network simulation time,
router bandwidth, varying traffic source counts to observe which
is one of the best TCP variant in different scenarios. Analysis
was done using dumbbell topology to figure out the comparative
maximum throughput of TCP variants. The analysis gives result
as TCP Variant “NewReno” is good when low bandwidth is used,
while TCP Variant “HighS peed” is good in terms of using large
bandwidths in comparison to Westwood. Network traffic flow
was observed in NetAnim tool.
Chorus is a novel broadcast protocol that improves the efficiency and scalability of wireless broadcast using self-interference cancellation at the MAC/PHY layers. It allows packet collisions and resolves them using symbol-level interference cancellation and iterative decoding. This collision-tolerant mechanism significantly improves spatial reuse and transmission diversity. Chorus also includes a cognitive MAC sensing and scheduling scheme that further facilitates these advantages, resulting in asymptotic broadcast delay proportional to the network radius. Evaluation shows Chorus provides significantly better performance than CSMA/CA-based protocols in terms of scalability, reliability, delay, and other metrics across various network scenarios.
International Journal of Engineering Research and Applications (IJERA) is a team of researchers not publication services or private publications running the journals for monetary benefits, we are association of scientists and academia who focus only on supporting authors who want to publish their work. The articles published in our journal can be accessed online, all the articles will be archived for real time access.
Our journal system primarily aims to bring out the research talent and the works done by sciaentists, academia, engineers, practitioners, scholars, post graduate students of engineering and science. This journal aims to cover the scientific research in a broader sense and not publishing a niche area of research facilitating researchers from various verticals to publish their papers. It is also aimed to provide a platform for the researchers to publish in a shorter of time, enabling them to continue further All articles published are freely available to scientific researchers in the Government agencies,educators and the general public. We are taking serious efforts to promote our journal across the globe in various ways, we are sure that our journal will act as a scientific platform for all researchers to publish their works online.
This paper proposes a new end-to-end congestion control protocol called ACP that is designed for high bandwidth-delay product networks. ACP aims to achieve high link utilization, fairness among flows, and fast convergence. It does this by estimating the bottleneck queue size upon detecting congestion and decreasing the congestion window by exactly the amount needed to empty the queue. It also uses a "fairness ratio" metric to determine window increases to ensure convergence to a fair share of bandwidth among flows. The paper argues that existing protocols cannot achieve high utilization and fairness due to their inability to accurately measure link load. It claims ACP addresses this through a new congestion window control approach combining queue size estimation and a fairness measure.
1. The document analyzes TCP Vegas congestion control in Linux 2.6.1. TCP Vegas monitors the difference between expected sending rate and actual sending rate to estimate network congestion and adjust the congestion window size accordingly.
2. The key aspects of TCP Vegas analyzed are delay, fairness, and loss properties. TCP Vegas aims to keep a small, stable number of packets buffered to minimize delay while achieving weighted proportional fairness between connections. It avoids packet loss by carefully extracting congestion information from round-trip times.
3. Analysis shows that in Linux implementation, TCP Vegas increases and decreases the congestion window cautiously in response to traffic, avoiding sharp increases in window size that could lead to congestion like in TCP
A COMPARISON OF CONGESTION CONTROL VARIANTS OF TCP IN REACTIVE ROUTING PROTOC...ijcsit
A widely used TCP protocol is originally developed for wired networks. It has many variants to detect and
control congestion in the network. However, Congestion control in all TCP variants does not show similar
performance in MANET as in wired network because of the fault detection of congestion. In this paper, we
do a performance comparison between TCP variants NEW RENO, SACK and Vegas in AODV and DSR
reactive (On-Demand) routing protocols. Network traffic between nodes is provided by using File Transfer
Protocol (FTP) application. Multiple scenarios are created and the average values of each performance
parameter are used to evaluate the performance. The results show that TCP variants perform better in
terms of throughput and Packet drop with DSR routing protocol compared with AODV routing protocol.
TCP variants show a lower Jitter in AODV compared with DSR.
The document discusses data link control and various related topics:
1. Link throughput is reduced by factors like frame overheads, propagation delay, acknowledgements, and retransmissions. HDLC and PPP are protocols that use frames for data transmission.
2. Flow control uses window mechanisms to regulate the maximum number of unacknowledged frames sent to prevent overflow. This affects throughput.
3. Link management procedures are needed to handle link and node failures and ensure frames are delivered properly.
Mobile stations must share a single channel for communication, which can lead to collisions if multiple stations transmit simultaneously. Several protocols have been developed to manage access to the shared channel, including ALOHA, CSMA, and their variations. CSMA/CA with RTS/CTS is commonly used in wireless networks as it helps avoid collisions and resolve the hidden terminal problem.
This document discusses various transport layer protocols for mobile networks. It begins with an overview of TCP and UDP, and then describes several strategies for improving TCP performance over mobile networks, including indirect TCP (I-TCP), snooping TCP, and Mobile TCP. It also discusses congestion control strategies like slow start and fast retransmit. Overall, the document analyzes how TCP can be optimized through techniques like connection splitting, buffering, and selective retransmission to better accommodate the characteristics of wireless networks.
avoiding retransmissions using random coding scheme or fountain code schemeIJAEMSJORNAL
In a perfect world, the throughput of a Multipath TCP (MPTCP) association ought to be as high as that of different disjoint single-way TCP streams. In actuality, the throughput of MPTCP is far lower than anticipated. In this paper, we lead angeneral reproduction construct ponder in light of this peculiarity, and the outcomes show that a sub stream encountering high postponement and misfortune extremely influences the execution of other sub streams, in this manner turning into the half back of the MPTCP association and knowingly humiliating the total great put. To handle this issue, we propose Wellspring code-based Multipath TCP (FMTCP), which viably mitigates the negative effect of the heterogeneity of modified ways. FMTCP exploits the unintentional way of the wellspring code to adaptably transmit encoded images from the same or diverse information hinders over various sub streams. In addition, we plan an information portion calculation in view of the foreseen bundle arriving time and deciphering command to facilitate the transmissions of various sub streams. Quantitative reviews are given to demonstrate the advantage of FMTCP. We likewise assess the presentation of FMTCP through ns-2 recreations and exhibit that FMTCP beats IETF-MPTCP, a run of the mill MPTCP approach, when the ways have various misfortune and deferral as far as higher aggregate great put, bring down postponement, and jitter. Also, FMTCP acknowledges high security under sudden changes of way quality.
T/TCP is a protocol that aims to reduce the number of packets needed for transaction-style applications by allowing a client to open a connection, send data, and close the connection in a single packet. It utilizes a mechanism called TCP Accelerated Open (TAO) to bypass the standard 3-way TCP handshake. Testing showed T/TCP saved an average of 5 packets per transaction compared to TCP. However, the percentage savings decreased with larger data transfers as T/TCP is most beneficial for small transactions. While improving performance, T/TCP also introduced some security and operational issues that needed to be addressed for broader adoption.
Iaetsd an effective approach to eliminate tcp incastIaetsd Iaetsd
This document proposes an Incast Congestion Control for TCP (ICTCP) scheme to eliminate TCP incast collapse in datacenter environments. TCP incast collapse occurs when multiple synchronized servers send data to the same receiver in parallel, overwhelming the switch buffer and causing packet loss. ICTCP is a receiver-side approach that proactively adjusts the TCP receive window size of connections to control their aggregate burstiness and prevent switch buffer overflow before packet loss occurs. It estimates available bandwidth and uses this as a quota to coordinate receive window increases. For each connection, the receive window is adjusted based on the ratio of the difference between measured and expected throughput. This allows adaptive tuning of receive windows to meet sender throughput needs while avoiding congest
DOTNET 2013 IEEE MOBILECOMPUTING PROJECT Delay optimal broadcast for multihop...IEEEGLOBALSOFTTECHNOLOGIES
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CoDel is a new active queue management algorithm that controls queue delay without requiring configuration. It uses the minimum packet sojourn time through the queue to distinguish good queueing from bad queueing that causes excessive delays. Simulation results show that CoDel adapts well to dynamically changing link rates and traffic loads, maintaining high utilization while keeping delays low. CoDel is suitable for deployment in routers and home gateways to help solve the problem of bufferbloat on the Internet.
Improvement of Congestion window and Link utilization of High Speed Protocols...IOSR Journals
This document summarizes a research paper that proposes using a k-nearest neighbors (k-NN) algorithm to help high-speed transport layer protocols like CUBIC better distinguish between packet drops due to network congestion versus other factors like noise. The k-NN algorithm would analyze patterns in packet drop history to classify new drops, helping protocols avoid unnecessary window size reductions when drops are not actually due to congestion. The document provides background on high-speed protocols, issues like underutilization from treating all drops as congestion, and how incorporating k-NN classification could improve protocols' performance in noisy network conditions.
The document discusses various transport layer protocols for mobile computing environments:
- Traditional TCP faces problems with high error rates and mobility-induced packet losses in wireless networks. It can lead to severe performance degradation.
- Indirect TCP segments the TCP connection and uses a specialized TCP for the wireless link, isolating wireless errors. But it loses end-to-end semantics.
- Snooping TCP buffers packets near the mobile host and performs local retransmissions transparently. But wireless errors can still propagate to the server.
- Mobile TCP splits the connection and uses different mechanisms on each segment. It chokes the sender window during disconnections to avoid retransmissions and slow starts. This maintains throughput during
This document presents an overview of computer network congestion and congestion control techniques. It defines congestion as occurring when too many packets are present in a network link, causing queues to overflow and packets to drop. It then discusses factors that can cause congestion as well as the costs. It outlines open-loop and closed-loop congestion control approaches. Specific algorithms covered include leaky bucket, token bucket, choke packets, hop-by-hop choke packets, and load shedding. The document concludes by noting the importance of efficient congestion control techniques with room for improvement.
The SWF file format is available as an open specification to create products and technology that implement the specification. SWF 9 introduced the ActionScript™ 3.0 language and virtual machine. The SWF 10 specification expands text capabilities with support for bidirectional text and complex scripts with the new DefineFont4 tag. The DefineBitsJPEG4 tag allows embedding JPEG images that have an alpha channel for opacity and also a smoothing filter. SWF 10 also adds support for the free and open-source Speex voice codec and for higher frequencies in the existing Nellymoser codec.
Este documento resume los principales mercados de exportación del Perú y la evolución de las exportaciones peruanas a Alemania. En 2014, los principales mercados de exportación del Perú fueron China, Estados Unidos, Suiza, Canadá y Brasil. Las exportaciones peruanas a Alemania han ido aumentando desde 2010, alcanzando US$ 1.9 mil millones en 2014. Los principales productos agropecuarios y agroindustriales exportados a Alemania incluyen uvas frescas, espárragos, aguacates y quinua.
The document is an introduction to cryptography and digital signatures by Ian Curry from March 2001. It discusses the history of cryptography and the problem of key management. It then describes how public-key cryptography helped address key management issues for large networks by allowing secure distribution of public keys. The document also provides an overview of how Entrust uses a combination of symmetric and public-key cryptography to provide encryption, authentication, integrity, and non-repudiation for electronic communications like sending a secure electronic check. This includes digitally signing the check with a private key, encrypting it with a symmetric key, and securely delivering the symmetric key to the recipient using the recipient's public key.
The document summarizes and dispels five common myths about open source security software:
1. Open source software is too risky for IT security. However, open source is already widely used in enterprise IT infrastructure and can be more secure due to many experts reviewing code.
2. Open source software is free. While the code is free to download, significant resources are required to manage, support, and maintain open source solutions. Commercial open source vendors provide support and integration.
3. Open source vendors add little value. Vendors contribute to open source communities and add features for enterprise use cases like documentation, interfaces and integration between projects.
4. Proprietary solutions are more reliable. Experts already
The document discusses a presentation on hardware topics. It will cover motherboards and central processing units (CPUs), providing essential information about these core computer components in 3 sentences or less.
This document describes transport, protocol, and individual methods available via the Metasploit Remote API. This API can be used to programmatically drive the Metasploit Framework and Metasploit Pro products.
This document provides an overview and user guide for Metasploit Express release 4.6. It includes sections on the target audience, document organization and conventions. It also covers support options, an overview of Metasploit Express components and functionality, common terminology, and instructions for various administrative and usage tasks within the software.
Lecture 19 22. transport protocol for ad-hoc Chandra Meena
This document discusses transport layer protocols for mobile ad hoc networks (MANETs). It begins with an introduction to MANETs and the need for new network architectures and protocols to support new types of networks. It then provides an overview of TCP/IP and how TCP works, including congestion control mechanisms. The document discusses challenges for TCP over wireless networks, where packet losses are often due to errors rather than congestion. It covers different versions of TCP and their approaches to congestion control. The goal is to design transport layer protocols that can address the unreliable links and frequent topology changes in MANETs.
Abstract - The Transmission Control Protocol (TCP) is
connection oriented, reliable and end-to-end protocol that support
flow and congestion control, with the evolution and rapid growth
of the internet and emergence of internet of things IoT, flow and
congestion have clear impact in the network performance. In this
paper we study congestion control mechanisms Tahoe, Reno,
Newreno, SACK and Vegas, which are introduced to control
network utilization and increase throughput, in the performance
evaluation we evaluate the performance metrics such as
throughput, packets loss, delivery and reveals impact of the cwnd.
Showing that SACK had done better performance in terms of
numbers of packets sent, throughput and delivery ratio than
Newreno, Vegas shows the best performance of all of them.
A THROUGHPUT ANALYSIS OF TCP IN ADHOC NETWORKScsandit
This document analyzes the throughput of TCP in mobile ad hoc networks through simulations. It finds that TCP throughput decreases initially as the number of hops increases, then stabilizes at higher hop counts. This is due to hidden terminal problems at low hops. The number of retransmissions increases with payloads and flows due to buffering and congestion. TCP performance degrades in wireless networks because it cannot differentiate between congestion and non-congestion packet losses. Mobility, interference, and dynamic topology changes specific to wireless networks cause unnecessary triggering of TCP congestion control mechanisms.
A throughput analysis of tcp in adhoc networkscsandit
Transmission Control Protocol (TCP) is a connection oriented end-end reliable byte stream
transport layer protocol. It is widely used in the Internet.TCP is fine tuned to perform well in
wired networks. However the performance degrades in mobile ad hoc networks. This is due to
the characteristics specific to wireless networks, such as signal fading, mobility, unavailability
of routes. This leads to loss of packets which may arise either from congestion or due to other
non-congestion events. However TCP assumes every loss as loss due to congestion and invokes
the congestion control procedures. TCP reduces congestion window in response, causing unnecessary
degradation in throughput. In mobile ad hoc networks multi-hop path forwarding further
worsens the packet loss and throughput. To understand the TCP behavior and improve the
TCP performance over mobile ad hoc networks considerable research has been carried out. As
the research is still active in this area a comprehensive and in-depth study on the TCP throughput
and the various parameters that degrade the performance of TCP have been analyzed. The
analysis is done using simulations in Qualnet 5.0
IMPACT OF CONTENTION WINDOW ON CONGESTION CONTROL ALGORITHMS FOR WIRELESS ADH...cscpconf
TCP congestion control mechanism is highly dependent on MAC layer Backoff algorithms that
predict the optimal Contention Window size to increase the TCP performance in wireless adhoc
network. This paper critically examines the impact of Contention Window in TCP congestion
control approaches. The modified TCP congestion control method gives the stability of
congestion window which provides higher throughput and shorter delay than the traditional TCP. Various Backoff algorithms that are used to adjust Contention Window are simulatedusing NS2 along with modified TCP and their performance are analyzed to depict the influence of Contention Window in TCP performance considering the metrics such as throughput, delay, packet loss and end-to-end delay
This document summarizes a survey and analysis of various host-to-host congestion control proposals for TCP data transmission. It discusses the basic principles that underlie current host-to-host algorithms, including probing available network resources, estimating congestion through packet loss or delay, and quickly detecting packet losses. The document then analyzes specific algorithms like slow start, congestion avoidance, and fast recovery. It also examines calculating retransmission timeout and round-trip time, congestion avoidance and packet recovery techniques, and data transmission in TCP. The overall goal of these proposals is to control congestion in a distributed manner without relying on explicit network notifications.
Analysis of Rate Based Congestion Control Algorithms in Wireless TechnologiesIOSR Journals
The document analyzes various rate-based congestion control algorithms for wireless technologies. It finds that TCP Vegas performs better than other TCP variants in terms of delivery fraction and delay. However, TCP Vegas has a consistent window size. Congestion avoidance is more effective at resolving congestion and has higher throughput than slow start. Cross-layer congestion control requires significant power and memory. The document then analyzes the performance of AIMD, TFRC, and TCP congestion control protocols via simulation. It finds that GAIMD performs better than TFRC in terms of throughput, while TFRC is better than GAIMD in terms of smoothness.
ANALYSIS AND EXPERIMENTAL EVALUATION OF THE TRANSMISSION CONTROL PROTOCOL CON...IRJET Journal
This document analyzes and experimentally evaluates several TCP congestion control algorithms (variants) - TCP cubic, TCP hybla, TCP scalable, TCP Vegas, and TCP Westwood - in a wireless multihop environment. It aims to understand the throughput performance of each variant as the number of nodes increases. The analysis provides insights into how well different variants can adapt to dynamic multihop wireless networks. It experimentally tests the variants in a simulation using Network Simulator 2 and compares their throughput performance under varying node counts. The goal is to help develop more robust TCP algorithms that can effectively manage congestion in challenging wireless network conditions.
Improving Performance of TCP in Wireless Environment using TCP-PIDES Editor
Improving the performance of the transmission
control protocol (TCP) in wireless environment has been an
active research area. Main reason behind performance
degradation of TCP is not having ability to detect actual reason
of packet losses in wireless environment. In this paper, we are
providing a simulation results for TCP-P (TCP-Performance).
TCP-P is intelligent protocol in wireless environment which
is able to distinguish actual reasons for packet losses and
applies an appropriate solution to packet loss.
TCP-P deals with main three issues, Congestion in
network, Disconnection in network and random packet losses.
TCP-P consists of Congestion avoidance algorithm and
Disconnection detection algorithm with some changes in TCP
header part. If congestion is occurring in network then
congestion avoidance algorithm is applied. In congestion
avoidance algorithm, TCP-P calculates number of sending
packets and receiving acknowledgements and accordingly set
a sending buffer value, so that it can prevent system from
happening congestion. In disconnection detection algorithm,
TCP-P senses medium continuously to detect a happening
disconnection in network. TCP-P modifies header of TCP
packet so that loss packet can itself notify sender that it is
lost.This paper describes the design of TCP-P, and presents
results from experiments using the NS-2 network simulator.
Results from simulations show that TCP-P is 4% more
efficient than TCP-Tahoe, 5% more efficient than TCP-Vegas,
7% more efficient than TCP-Sack and equally efficient in
performance as of TCP-Reno and TCP-New Reno. But we can
say TCP-P is more efficient than TCP-Reno and TCP-New
Reno since it is able to solve more issues of TCP in wireless
environment.
Effective Router Assisted Congestion Control for SDN IJECEIAES
This document proposes a new congestion control method called PACEC (Path Associativity Centralized Congestion Control) that works within the Software Defined Networking (SDN) framework. PACEC aims to overcome weaknesses of traditional Router Assisted Congestion Control (RACC) methods by utilizing global network information available in SDN. It calculates an aggregate rate for the entire data path rather than individual links. The controller collects switch utilization data and uses it to determine the path rate (Rp), updating it each control period. Simulation results show PACEC achieves better efficiency and fairness than TCP and RCP.
Comparative Analysis of Different TCP Variants in Mobile Ad-Hoc Network partha pratim deb
The document analyzes the performance of different TCP variants (New Reno, Reno, Tahoe) with MANET routing protocols (AODV, DSR, TORA) through simulation. It finds that in scenarios with 3 and 5 nodes, AODV has better throughput than DSR and TORA for all TCP variants. Throughput decreases for all variants as node count increases. New Reno provides multiple packet loss recovery and is the best choice for AODV in MANETs due to its consistent performance with changes in node count. Further analysis of additional protocols and TCP variants is recommended.
Enhancing HTTP Web Protocol Performance with Updated Transport Layer TechniquesIJCNCJournal
This document summarizes research on enhancing the performance of HTTP web traffic using updated transport layer techniques. It describes how standard TCP behavior is unsuitable for bursty HTTP traffic. The Congestion Window Validation (CWV) method was proposed to address this, but had drawbacks. A new method called newCWV was designed to estimate available path capacity more accurately and set the congestion window appropriately. The paper discusses implementing newCWV in the Linux TCP/IP stack and experimental results showing a 50% improvement in web browsing speed over conventional TCP in an uncongested network.
Enhancing HTTP Web Protocol Performance with Updated Transport Layer TechniquesIJCNCJournal
Popular Internet applications such as web browsing, and web video download use HTTP protocol as application over the standard Transport Control Protocol (TCP). Traditional TCP behavior is unsuitable for this style of application because their transmission rate and traffic pattern are different from conventional bulk transfer applications. Previous works have analyzed the interaction of these applications with the congestion control algorithms in TCP and the proposed Congestion Window Validation (CWV) as a solution. However, this method was incomplete and has been shown to present drawbacks. This paper focuses on the ‘newCWV’ which was designed to address these drawbacks. NewCWV provides a practical mechanism to estimate the available path capacity and suggests a more appropriate congestion control behavior. This paper describes how this algorithm was implemented in the Linux TCP/IP stack and tested by experiments, where results indicate that, with newCWV, the browsing can get 50% faster in an uncongested network.
Enhancing HTTP Web Protocol Performance with Updated Transport Layer TechniquesIJCNCJournal
Popular Internet applications such as web browsing, and web video download use HTTP protocol as application over the standard Transport Control Protocol (TCP). Traditional TCP behavior is unsuitable for this style of application because their transmission rate and traffic pattern are different from conventional bulk transfer applications. Previous works have analyzed the interaction of these applications with the congestion control algorithms in TCP and the proposed Congestion Window Validation (CWV) as a solution. However, this method was incomplete and has been shown to present drawbacks. This paper focuses on the ‘newCWV’ which was designed to address these drawbacks. NewCWV provides a practical mechanism to estimate the available path capacity and suggests a more appropriate congestion control behavior. This paper describes how this algorithm was implemented in the Linux TCP/IP stack and tested by experiments, where results indicate that, with newCWV, the browsing can get 50% faster in an uncongested network.
This summarizes a research paper that compares the performance of TCP protocols over satellite links, which have high round-trip times and bit error rates. It presents an enhanced version of TCP Hybla that combines aspects of TCP Hybla and TCP Westwood. TCP Hybla addresses high round-trip times but performs poorly with losses, while TCP Westwood handles losses but not high round-trip times. The enhanced protocol estimates utilized bandwidth to distinguish losses due to errors from congestion. If bandwidth used is less than half the link capacity after a loss, it sets thresholds aggressively to maintain high performance over satellite links. Simulation results show this enhanced approach significantly outperforms TCP Hybla and TCP Westwood for satellite links.
PERFORMANCE EVALUATION OF SELECTED E2E TCP CONGESTION CONTROL MECHANISM OVER ...ijwmn
TCP is one of the main protocols that govern the Internet traffic nowadays. However, it suffers significant
performance degradation over wireless links. Since wireless networks are leading the communication
technologies recently, it is imperative to introduce effective solutions for the TCP congestion control
mechanisms over such networks. In this research four End-to-End TCP implementations are discussed,
they are TCP Westwood, Hybla, Highspeed, and NewReno. The performance of these variants is compared
using LTE emulated environment in terms of throughput, delay, and fairness. Ns-3 simulator is used to
simulate the LTE networks environment. The simulation results showed that TCP Highspeed achieves the
best throughput results. Although TCP Westwood recorded the lowest latency values comparing to others,
it behaved unfairly among different traffic flows. Moreover, TCP Hybla demonstrated the best fairness
behaviour among other TCP variants
Recital Study of Various Congestion Control Protocols in wireless networkiosrjce
IOSR Journal of Computer Engineering (IOSR-JCE) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of computer engineering and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications in computer technology. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
This document discusses and compares several congestion control protocols for wireless networks, including TCP, RCP, and RCP+. It implemented an enhanced version of RCP+ in the NS-2 simulator. Simulation results showed that the proposed approach achieved higher throughput and packet delivery ratio than TCP and RCP+ in a wireless network with 10-50 nodes, with performance degrading as the number of nodes increased beyond 20 due to increased congestion. The paper analyzes the mechanisms and equations of each protocol and argues the proposed approach combines benefits of improved AIMD and RCP+ to address their individual shortcomings.
Application-Driven Flow Control in Network-on-Chip for Many-Core ArchitecturesIvonne Liu
This document proposes Floodgate, a proactive congestion control mechanism for network-on-chip (NoC) in many-core architectures. Floodgate predicts global traffic patterns by capturing the repetitive data transmission behavior of applications. It uses an application-level prediction table to accurately forecast traffic and a packet scheduler to control injection and avoid congestion. Evaluation shows Floodgate achieves superior performance with negligible overhead compared to reactive approaches.
This whitepaper details research conducted by Rapid7, which reveals that around 40-50 million network-enabled devices are at risk due to vulnerabilities found in the Universal Plug and Play (UPnP) protocol. UPnP enables devices such as routers, printers, network-attached storage (NAS), media players and smart TVs to communicate with each other
Zmap fast internet wide scanning and its security applicationslosalamos
Internet-wide network scanning has numerous security
applications, including exposing new vulnerabilities and
tracking the adoption of defensive mechanisms, but probing the entire public address space with existing tools is
both difficult and slow. We introduce ZMap, a modular,
open-source network scanner specifically architected to
perform Internet-wide scans and capable of surveying
the entire IPv4 address space in under 45 minutes from
user space on a single machine,
The document discusses generics in Java. It introduces key terms related to generics like parameterized types, actual type parameters, formal type parameters, raw types, and wildcard types. It advises developers to avoid using raw types in new code and instead use parameterized types or wildcard types to maintain type safety. It also recommends eliminating all unchecked warnings from code by resolving the issues, and only suppressing warnings when absolutely necessary and the code has been proven type-safe.
Developing Adobe AIR 1.5 Applications with HTML and Ajaxlosalamos
The document provides instructions for developing Adobe AIR 1.5 applications using HTML and Ajax. It discusses installing Adobe AIR and the AIR software development kit. It also provides steps for creating a basic HTML-based AIR application using either the AIR SDK or Adobe Dreamweaver. The document aims to help developers get started with building AIR applications.
BrowserShield is a system that uses vulnerability-driven filtering to protect web browsers from exploits. It rewrites HTML pages and embedded scripts to apply runtime checks based on known vulnerabilities. When a page loads, the BrowserShield JavaScript library translates the page into a safe equivalent. Any scripts are rewritten using techniques like callee rewriting to allow interposition. This mediates access to the document tree and enforces policies like detecting and blocking the HTML Elements Vulnerability. Evaluation shows it can prevent all exploits of vulnerabilities while maintaining reasonable performance.
"Start-up dynamics of TCP's Congestion Control and Avoidance Schemes"losalamos
Janie Hoe.
Master Thesis 1995.
This master thesis is really interesting since Janie Hoe was the first who introduced some basic concepts which could be found few times later in many algorithms which deal with recovery from multiple losses inside a window a data.
A paper released today by ICANN provides a chronology of events related to the containment of the Conficker worm. The report, "Conficker Summary and Review (PDF)," is authored by Dave Piscitello, ICANN's Senior Security Technologist on behalf of the organization's security team. Below is the introduction excerpt from the paper:
The Conficker worm first appeared in October 2008 and quickly earned as much notoriety as Code Red, Blaster, Sasser and SQL Slammer. The infection is found in both home and business networks, including large multi‐national enterprise networks. Attempts to estimate the populations of Conficker infected hosts at any given time have varied widely, but all estimates exceed millions of personal computers.
The document summarizes deviations between JScript and ECMAScript Edition 3. It discusses 22 specific deviations across areas like white space handling, future reserved words, string literals, the arguments object, global object handling, and more. For each deviation, it provides an example and the output from running the example on different browsers to illustrate differences in implementation. The goal is to document JScript's non-conformance to the ECMA specification for various language features.
Sourcefire Vulnerability Research Team Labslosalamos
Today's client side attack threats represent a boon for the attacker in ways to obfuscate, evade, and hide their attacks methods. Adobe PDF, Flash, Microsoft Office documents, and Javascript require a very deep understanding of the file format, how its interpreted in the Browser, and understanding of the byte code paths that some of these formats can generate. To effectively handle some of these types of attacks it requires processing of these files multiple times to deal with compression, obfuscation, program execution, etc. This requires a new type of system to handle this type of inspection. The NRT system allows for this deep file format understanding and inspection.
Target audience: Interaction designers, Introductory game design
This talk is about building learning and fun into your applications. If you’ve ever wondered
how games work and how they can help you build better apps, this is the talk for you.
Along the way, we’ll discuss a new philosophy of interaction design that is already creating
a major competitive advantage for innovative application developers.
Securing your Apache Web Server with a thawte
Digital Certificate with a thawte Digital Certificate A STEP-
BY-STEP GUIDE to test, install and use a thawte Digital
Certificate on your Apache Web Server...
Innovación es la piedra fundamental del progreso en el área tecnológica. En IBM,
innovación ha sido parte fundamental en la evolución de nuestros servidores de datos.
Habiendo sido pioneros en tecnologías de manejo de datos en los sesentas y setentas,
hemos continuado haciendo disponibles tecnologías innovadoras en el área de manejo de
datos. Esto se demuestra por las miles de patentes en esta área creados por especialistas
de IBM. Como resultado, muchas de las grandes empresas del mundo de hoy en día
cuentan en los productos de IBM, como DB2, para manejar sus soluciones que requieren
de mucho poder y capacidad y que son de misión critica.
El documento describe las misiones que Dios le asignó a cada uno de los 12 signos del zodiaco. A cada signo se le dio una tarea y un don específico. Dios les pidió que usen sus dones para ayudar a los humanos a comprender la creación divina y corregir las distorsiones que introducen en la idea original. El propósito final es que los 12 signos trabajen juntos como uno solo.
El documento presenta varias citas de diferentes autoras sobre la importancia y el placer de la lectura. Resalta cómo la lectura permite transportarse a otros mundos, ampliar los horizontes, nutrir el pensamiento crítico y la imaginación. También destaca los desafíos históricos para que las mujeres accedieran a la educación y cómo la lectura les permitió empoderarse intelectualmente.
Un burro cayó en un pozo seco y el campesino intentó sacarlo sin éxito. El campesino decidió enterrar al burro, pero mientras los vecinos echaban tierra, el burro se sacudía y daba pasos hacia arriba hasta salir del pozo. El cuento enseña que los problemas de la vida son escalones para progresar si uno se sacude la negatividad y da pasos hacia adelante.
Este documento proporciona un resumen de las soluciones de protección de datos personales en entornos Microsoft. Explica brevemente los principios básicos de protección de datos como la calidad de los datos, la información previa a los titulares de datos, los derechos de acceso, rectificación y cancelación, y las medidas de seguridad requeridas. Luego, describe cómo los productos de Microsoft como Windows, Office y SQL Server pueden ayudar a las organizaciones a cumplir con estos requisitos legales de protección de datos. Finalmente, incluye pró
Dr. Sean Tan, Head of Data Science, Changi Airport Group
Discover how Changi Airport Group (CAG) leverages graph technologies and generative AI to revolutionize their search capabilities. This session delves into the unique search needs of CAG’s diverse passengers and customers, showcasing how graph data structures enhance the accuracy and relevance of AI-generated search results, mitigating the risk of “hallucinations” and improving the overall customer journey.
UiPath Test Automation using UiPath Test Suite series, part 5DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 5. In this session, we will cover CI/CD with devops.
Topics covered:
CI/CD with in UiPath
End-to-end overview of CI/CD pipeline with Azure devops
Speaker:
Lyndsey Byblow, Test Suite Sales Engineer @ UiPath, Inc.
Alt. GDG Cloud Southlake #33: Boule & Rebala: Effective AppSec in SDLC using ...James Anderson
Effective Application Security in Software Delivery lifecycle using Deployment Firewall and DBOM
The modern software delivery process (or the CI/CD process) includes many tools, distributed teams, open-source code, and cloud platforms. Constant focus on speed to release software to market, along with the traditional slow and manual security checks has caused gaps in continuous security as an important piece in the software supply chain. Today organizations feel more susceptible to external and internal cyber threats due to the vast attack surface in their applications supply chain and the lack of end-to-end governance and risk management.
The software team must secure its software delivery process to avoid vulnerability and security breaches. This needs to be achieved with existing tool chains and without extensive rework of the delivery processes. This talk will present strategies and techniques for providing visibility into the true risk of the existing vulnerabilities, preventing the introduction of security issues in the software, resolving vulnerabilities in production environments quickly, and capturing the deployment bill of materials (DBOM).
Speakers:
Bob Boule
Robert Boule is a technology enthusiast with PASSION for technology and making things work along with a knack for helping others understand how things work. He comes with around 20 years of solution engineering experience in application security, software continuous delivery, and SaaS platforms. He is known for his dynamic presentations in CI/CD and application security integrated in software delivery lifecycle.
Gopinath Rebala
Gopinath Rebala is the CTO of OpsMx, where he has overall responsibility for the machine learning and data processing architectures for Secure Software Delivery. Gopi also has a strong connection with our customers, leading design and architecture for strategic implementations. Gopi is a frequent speaker and well-known leader in continuous delivery and integrating security into software delivery.
20 Comprehensive Checklist of Designing and Developing a WebsitePixlogix Infotech
Dive into the world of Website Designing and Developing with Pixlogix! Looking to create a stunning online presence? Look no further! Our comprehensive checklist covers everything you need to know to craft a website that stands out. From user-friendly design to seamless functionality, we've got you covered. Don't miss out on this invaluable resource! Check out our checklist now at Pixlogix and start your journey towards a captivating online presence today.
In his public lecture, Christian Timmerer provides insights into the fascinating history of video streaming, starting from its humble beginnings before YouTube to the groundbreaking technologies that now dominate platforms like Netflix and ORF ON. Timmerer also presents provocative contributions of his own that have significantly influenced the industry. He concludes by looking at future challenges and invites the audience to join in a discussion.
Encryption in Microsoft 365 - ExpertsLive Netherlands 2024Albert Hoitingh
In this session I delve into the encryption technology used in Microsoft 365 and Microsoft Purview. Including the concepts of Customer Key and Double Key Encryption.
Pushing the limits of ePRTC: 100ns holdover for 100 daysAdtran
At WSTS 2024, Alon Stern explored the topic of parametric holdover and explained how recent research findings can be implemented in real-world PNT networks to achieve 100 nanoseconds of accuracy for up to 100 days.
For the full video of this presentation, please visit: https://www.edge-ai-vision.com/2024/06/building-and-scaling-ai-applications-with-the-nx-ai-manager-a-presentation-from-network-optix/
Robin van Emden, Senior Director of Data Science at Network Optix, presents the “Building and Scaling AI Applications with the Nx AI Manager,” tutorial at the May 2024 Embedded Vision Summit.
In this presentation, van Emden covers the basics of scaling edge AI solutions using the Nx tool kit. He emphasizes the process of developing AI models and deploying them globally. He also showcases the conversion of AI models and the creation of effective edge AI pipelines, with a focus on pre-processing, model conversion, selecting the appropriate inference engine for the target hardware and post-processing.
van Emden shows how Nx can simplify the developer’s life and facilitate a rapid transition from concept to production-ready applications.He provides valuable insights into developing scalable and efficient edge AI solutions, with a strong focus on practical implementation.
Securing your Kubernetes cluster_ a step-by-step guide to success !KatiaHIMEUR1
Today, after several years of existence, an extremely active community and an ultra-dynamic ecosystem, Kubernetes has established itself as the de facto standard in container orchestration. Thanks to a wide range of managed services, it has never been so easy to set up a ready-to-use Kubernetes cluster.
However, this ease of use means that the subject of security in Kubernetes is often left for later, or even neglected. This exposes companies to significant risks.
In this talk, I'll show you step-by-step how to secure your Kubernetes cluster for greater peace of mind and reliability.
Threats to mobile devices are more prevalent and increasing in scope and complexity. Users of mobile devices desire to take full advantage of the features
available on those devices, but many of the features provide convenience and capability but sacrifice security. This best practices guide outlines steps the users can take to better protect personal devices and information.
Climate Impact of Software Testing at Nordic Testing DaysKari Kakkonen
My slides at Nordic Testing Days 6.6.2024
Climate impact / sustainability of software testing discussed on the talk. ICT and testing must carry their part of global responsibility to help with the climat warming. We can minimize the carbon footprint but we can also have a carbon handprint, a positive impact on the climate. Quality characteristics can be added with sustainability, and then measured continuously. Test environments can be used less, and in smaller scale and on demand. Test techniques can be used in optimizing or minimizing number of tests. Test automation can be used to speed up testing.
Generative AI Deep Dive: Advancing from Proof of Concept to ProductionAggregage
Join Maher Hanafi, VP of Engineering at Betterworks, in this new session where he'll share a practical framework to transform Gen AI prototypes into impactful products! He'll delve into the complexities of data collection and management, model selection and optimization, and ensuring security, scalability, and responsible use.
Enchancing adoption of Open Source Libraries. A case study on Albumentations.AIVladimir Iglovikov, Ph.D.
Presented by Vladimir Iglovikov:
- https://www.linkedin.com/in/iglovikov/
- https://x.com/viglovikov
- https://www.instagram.com/ternaus/
This presentation delves into the journey of Albumentations.ai, a highly successful open-source library for data augmentation.
Created out of a necessity for superior performance in Kaggle competitions, Albumentations has grown to become a widely used tool among data scientists and machine learning practitioners.
This case study covers various aspects, including:
People: The contributors and community that have supported Albumentations.
Metrics: The success indicators such as downloads, daily active users, GitHub stars, and financial contributions.
Challenges: The hurdles in monetizing open-source projects and measuring user engagement.
Development Practices: Best practices for creating, maintaining, and scaling open-source libraries, including code hygiene, CI/CD, and fast iteration.
Community Building: Strategies for making adoption easy, iterating quickly, and fostering a vibrant, engaged community.
Marketing: Both online and offline marketing tactics, focusing on real, impactful interactions and collaborations.
Mental Health: Maintaining balance and not feeling pressured by user demands.
Key insights include the importance of automation, making the adoption process seamless, and leveraging offline interactions for marketing. The presentation also emphasizes the need for continuous small improvements and building a friendly, inclusive community that contributes to the project's growth.
Vladimir Iglovikov brings his extensive experience as a Kaggle Grandmaster, ex-Staff ML Engineer at Lyft, sharing valuable lessons and practical advice for anyone looking to enhance the adoption of their open-source projects.
Explore more about Albumentations and join the community at:
GitHub: https://github.com/albumentations-team/albumentations
Website: https://albumentations.ai/
LinkedIn: https://www.linkedin.com/company/100504475
Twitter: https://x.com/albumentations