The document discusses different types of switching structures used in networks, including circuit switching and packet switching. It describes circuit switching techniques like space division switching using crossbar and multistage switches, as well as time division switching using time slot interchange. It also covers the basic components of a packet switch including input/output ports, routing processor, and switching fabrics like crossbar, banyan, and batcher banyan switches. The advantages and disadvantages of different switching techniques are highlighted.
Introduction of memory Segmentation
Segmentation is the process in which the main memory of the computer is logically divided into different segments and each segment has its own base address.
Memory segmentation is the methods where whole memory is divided into the smaller parts called segments of various sizes.
A segment is just an area in memory.
The process of dividing memory this way is called segmentation.
Introduction of memory Segmentation
Segmentation is the process in which the main memory of the computer is logically divided into different segments and each segment has its own base address.
Memory segmentation is the methods where whole memory is divided into the smaller parts called segments of various sizes.
A segment is just an area in memory.
The process of dividing memory this way is called segmentation.
The data link layer, or layer 2, is the second layer of the seven-layer OSI model of computer networking. This layer is the protocol layer that transfers data between adjacent network nodes in a wide area network (WAN) or between nodes on the same local area network (LAN) segment.
Hello People.. Welcome to GURUKULA!!!
Have you ever thought that how the protocols that are required for the effective delivery of the messages from one place to anpther place take place in a real time internet..... This video explains about the concept called PROTOCOL LAYERING, where you can learn the way how the protocols are layered in such a way..
Simple examples are also used to make the concepts clean nd clear.
This video will help you to learn:
What is protocol layering in networks, OSI Model in Computer Networks, Layers of OSI Model, OSI Model, OSI Internet Module, OSI Layers and their Functions, Examples of OSI Models, 7 layers of OSI Models, Principles of Protocol Layering, Why layering the Protocols,
Thanks for Watching, Keep Supporting and Keep Sharing...
Channelization is a multiple-access method in which the available bandwidth of a link is shared in time, frequency, or through code, between different stations. The three channelization protocols are FDMA, TDMA, and CDMA
This method of checking the signal in the system for processing is called Polling Method. In this method, the problem is that the processor has to waste number of clock cycles just for checking the signal in the system, by this processor will become busy unnecessarily. If any signal came for the process, processor will take some time to process the signal due to the polling process in action. So system performance also will be degraded and response time of the system will also decrease.
Here is the presentation for Data Link Layer Numericals from the book Andrew S. Tanenbaum (Computer Networks) and B A Forouzan ( Data Communication and Networking)
It consists of switches & their structures.
Space Division Switch, Time Division switch, Time Space Time Division switch, Cross Bar Switch, Multistage switch, Banyan switch, Batcher BAnyan Switch etc.
The data link layer, or layer 2, is the second layer of the seven-layer OSI model of computer networking. This layer is the protocol layer that transfers data between adjacent network nodes in a wide area network (WAN) or between nodes on the same local area network (LAN) segment.
Hello People.. Welcome to GURUKULA!!!
Have you ever thought that how the protocols that are required for the effective delivery of the messages from one place to anpther place take place in a real time internet..... This video explains about the concept called PROTOCOL LAYERING, where you can learn the way how the protocols are layered in such a way..
Simple examples are also used to make the concepts clean nd clear.
This video will help you to learn:
What is protocol layering in networks, OSI Model in Computer Networks, Layers of OSI Model, OSI Model, OSI Internet Module, OSI Layers and their Functions, Examples of OSI Models, 7 layers of OSI Models, Principles of Protocol Layering, Why layering the Protocols,
Thanks for Watching, Keep Supporting and Keep Sharing...
Channelization is a multiple-access method in which the available bandwidth of a link is shared in time, frequency, or through code, between different stations. The three channelization protocols are FDMA, TDMA, and CDMA
This method of checking the signal in the system for processing is called Polling Method. In this method, the problem is that the processor has to waste number of clock cycles just for checking the signal in the system, by this processor will become busy unnecessarily. If any signal came for the process, processor will take some time to process the signal due to the polling process in action. So system performance also will be degraded and response time of the system will also decrease.
Here is the presentation for Data Link Layer Numericals from the book Andrew S. Tanenbaum (Computer Networks) and B A Forouzan ( Data Communication and Networking)
It consists of switches & their structures.
Space Division Switch, Time Division switch, Time Space Time Division switch, Cross Bar Switch, Multistage switch, Banyan switch, Batcher BAnyan Switch etc.
Switching concepts Data communication and networksNt Arvind
This slide explains you about the different types of sxitching networks like circuit switched network , datagram network , virtual circuit network , message switched network
In a telecommunications network, a switch is a device that channels incoming data from any of multiple input ports to the specific output port that will take the data toward its intended destination. In the traditional circuit-switched telephone network, one or more switches are used to set up a dedicated though temporary connection or circuit for an exchange between two or more parties. On an Ethernet local area network (LAN), a switch determines from the physical device (Media Access Control or MAC) address in each incoming message frame which output port to forward it to and out of. In a wide area packet-switched network such as the Internet, a switch determines from the IP address in each packet which output port to use for the next part of its trip to the intended destination.
Asynchronous Transfer Mode ATM is the cell relay protocol designed by ATM Forum and adopted by the ITU-T. Cell, a small fixed size block of information with asynchronous TDM ensures high speed real time transmission with efficient and cheaper technology. Instead of user addresses, it uses virtual circuit identifier and virtual path identifier, which can be repeated at unrelated locations. This technology ensures connectivity to much more users than normal packet switching networks.
ATM and ISDN-B combination allows high-speed interconnection of world's network.
A Virtual Circuit is a circuit used in transportation of data over a packet switch networks.
Virtual Circuit appears as if there is a physical path established between and source and destination so that all packets(data) can be routed over that path during the transmission
Information Technology
Rrjeta Kompjuterike. Computer Networks.
Vetëm për qëllime edukative. For Educational Purposes Only.
NOTE: Some text does not display correctly (behind image) because SlideShare deformed it during upload.
Disa nga tekstet nuk duket mire apo duken mas fotove ketu ka faj SlideShare.
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
NO1 Uk best vashikaran specialist in delhi vashikaran baba near me online vas...Amil Baba Dawood bangali
Contact with Dawood Bhai Just call on +92322-6382012 and we'll help you. We'll solve all your problems within 12 to 24 hours and with 101% guarantee and with astrology systematic. If you want to take any personal or professional advice then also you can call us on +92322-6382012 , ONLINE LOVE PROBLEM & Other all types of Daily Life Problem's.Then CALL or WHATSAPP us on +92322-6382012 and Get all these problems solutions here by Amil Baba DAWOOD BANGALI
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Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
(CNN)s, to adversarial attacks and presents a proactive training technique designed to counter them. We
introduce a novel volumization algorithm, which transforms 2D images into 3D volumetric representations.
When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
accuracy improvements over previous techniques. The results indicate that the combination of the volumetric
input and curriculum learning holds significant promise for mitigating adversarial attacks without necessitating
adversary training.
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
4. We use switches in two types of networks.
CIRCUIT SWITCHED NETWORK
PACKET SWITCHED NETWORK
5. Circuit switches use either of two technologies
SPACE DIVISION SWITCHES
TIME DIVISION SWITCHES
6. • Originally developed for analog environment & has been
carried over to digital domain.
• Transfer Signal from a given input to a specific
output(same for any switch).
• Provide separate physical connection between inputs
and outputs.
• Essentially a crossbar matrix.
• Having electromechanical crossbar at each point which
may be enabled or disabled using control unit
7.
8. Space Division Switches fall into two categories:
Space Division Switch
Crossbar Switch Multistage Switch
9. • Connects n inputs to m outputs in a switch using micro
switch
• at each cross-point.
• For example:
• To connect 1000 inputs to 1000 outputs requires a switch
with 1000,000 cross-points.
11. • The number of cross-points grows within the square of the
number of attached stations.
Costly for large switch.
• Cross points are inefficiently utilized.
Only a small fraction can engaged if many of stations
wants send data.
• Solution is to build Multistage switch
12. • By splitting the cross bar switch into smaller units &
interconnecting them , it is possible to built multistage
switches with fewer components.
• If one path fails then their ‘ll be possibility of another path.
• Reduce number of cross-points.
• More than one path network.
• Increased Reliability.
• More complex Control.
• May b blocking.
13. We Follow these steps:
STAGE 1: We divide the N input lines into groups ,each of
n lines. For each group we use one crossbar of size n*k,
where k is number of Crossbars . The first stage have N/n
crossbars of n*k cross-points.
STAGE 2: We use k crossbars ,each of size (N/n *N/n) in
middle stage.
STAGE 3: We use N/n crossbars, each of size k*n at the
third stage .
14. • We can calculate the total number of cross-points as
follows:
N/n(n*k)+K(N/n*N/n)+N/n(k*n)^2
FIRST STAGE SECOND STAGE THIRD STAGE
15. • First stage second stage Third stage
In three stage switch , the total number of crosspoints
is
2kN+k(N/n)^2
16. DESIGN OF THREE STAGE SWITCH, 200* 200 switch where (N=200) with k=4
and n=20
Solution:
Formula:
N/n(n*k) + K(N/n*N/n) + N/n(k*n)
200/20(20*4) + 4(10*10) + 10(4*20)
In first stage , we have N/n or 10 crossbars , each of size 20 *4.
In second stage ,we have 4 crossbars, each of size 10*10.
In third stage ,we have 10 crossbars, each of size 4*20.
Also calculated by General Formula:
2kN+k(N/n)^2
= 2*4*200+4(200/20)^2=2000 cross-points
17. N=200 , n=20, k=4
200/20 200/20
n
N
n
20*4
20*4
4*20
4*20
10*10
10*10
18. • Blocking during periods of heavy traffic.
• The whole idea of switching is to share the cross-points
in middle stage crossbars.
• Sharing can cause a lack of availability ,if resources are
limited and all users wants a connection at same time.
• Blocking refers to times when one input cannot be
connected to an output because there is no path
available between them.
• In large system having 1000 inputs and outputs ,the
number of stages increased, As stages increases the
blocking possibilities increases as well.
19.
20.
21. • Both voice and data can be sent through digital signals.
• All modern circuits uses time division switches.
• Time division switching uses time-division
multiplexing(TDM) Inside a switch said to be Time slot
interchange(TSI).
22. • Changed the order of slots based on desired connection.
Time slot interchange combines:
• TSI consists of Random Access Memory
The size of each location is same as the size of single
time slot.
The RAM fills up with incoming data from the time slots in
order
received or we can b said sequentially controlled.
• Control retrieve data from memory and passed to output
in desired manner. Selectively ,not sequentially.
23. Advantage of space division is that it is instantaneous.
Disadvantage is number of cross-points required to make
space division switching .
Advantage of time division switching it needs no cross-
points
Disadvantage in case of TSI each connection creates
delays.
24. Switch structure has four components:
Input ports
Output ports
Routing processor
Switching fabric
25. • An input port performs the physical and data –link
functions .
• Bits are constructed from received signal
• Packets are de-capsulated from frame
• Errors are detected and corrected
• Packet is now ready to be routed by network
• In addition to physical-layer processor and data link
processor , the input buffers to hold the packet.
26. • Output performs the same as input functions but in
reverse order.
• First the outgoing packets are queued , then packet is
encapsulated in frame.
• Finally the physical layer functions are applied to frame to
create the signal to be sent on line.
27. • The routing processor performs the functions of Network
layer
• Destination address is used to find the address of next
hop.
• Routing processor searches from Routing table.
28. • Packet switch is to move packet from input to output
queue.
• Speed affects the size of input/output queue.
• Overall delay in packet delivery
• Input port stored packet in memory
• Output port retrieve packet from memory
Types of switch fabrics:
• Cross-bar switch(same as discus previous)
• Banyan switch .
• Batcher banyan Switch.
29. • Multistage switch with micro-switches at each stage that
route the packets based on output port represents as a
binary string
• For n inputs and n outputs ,we have log2n stages with
n/2 micro-switches at each stage
• Having three stages left bit ,middle bit and right
bit.
30.
31. • Problem in Banyan switch: possibility of internal collision.
• Solve it by sorting arriving packets based on destination
port.
• Trap module prevents duplicate packets from passing to
banyan switch .