Circuit switching directly connects the sender and receiver through a dedicated physical path. Message switching transmits entire messages from node to node without establishing a dedicated path. Packet switching breaks messages into packets that can take different routes to the destination and are reassembled, allowing for more efficient use of bandwidth but introducing complexity.
switching techniques in data communication and networkingHarshita Yadav
it is a detailed presentation on switching techniques. it includes the three types of switching technique. it is described in such manner that you can learn switching without any difficulties.
Transmission media (data communication)Pritom Chaki
Transmission media is the material pathway that connects computers, different kinds of devices and people on a network. It can be compared to a superhighway carrying lots of information. Transmission media uses cables or electromagnetic signals to transmit data.
Wireless communication is the transfer of information between two or more points that are not connected by an electrical conductor.
The most common wireless technologies use radio
The network layer is responsible for routing packets from the source to destination. The routing algorithm is the piece of software that decides where a packet goes next (e.g., which output line, or which node on a broadcast channel).For connectionless networks, the routing decision is made for each datagram. For connection-oriented networks, the decision is made once, at circuit setup time.
Routing Issues
The routing algorithm must deal with the following issues:
Correctness and simplicity: networks are never taken down; individual parts (e.g., links, routers) may fail, but the whole network should not.
Stability: if a link or router fails, how much time elapses before the remaining routers recognize the topology change? (Some never do..)
Fairness and optimality: an inherently intractable problem. Definition of optimality usually doesn't consider fairness. Do we want to maximize channel usage? Minimize average delay?
When we look at routing in detail, we'll consider both adaptive--those that take current traffic and topology into consideration--and nonadaptive algorithms.
Introduction, Virtual and Datagram networks, study of router, IP protocol and addressing in the Internet, Routing algorithms, Broadcast and Multicast routing
switching techniques in data communication and networkingHarshita Yadav
it is a detailed presentation on switching techniques. it includes the three types of switching technique. it is described in such manner that you can learn switching without any difficulties.
Transmission media (data communication)Pritom Chaki
Transmission media is the material pathway that connects computers, different kinds of devices and people on a network. It can be compared to a superhighway carrying lots of information. Transmission media uses cables or electromagnetic signals to transmit data.
Wireless communication is the transfer of information between two or more points that are not connected by an electrical conductor.
The most common wireless technologies use radio
The network layer is responsible for routing packets from the source to destination. The routing algorithm is the piece of software that decides where a packet goes next (e.g., which output line, or which node on a broadcast channel).For connectionless networks, the routing decision is made for each datagram. For connection-oriented networks, the decision is made once, at circuit setup time.
Routing Issues
The routing algorithm must deal with the following issues:
Correctness and simplicity: networks are never taken down; individual parts (e.g., links, routers) may fail, but the whole network should not.
Stability: if a link or router fails, how much time elapses before the remaining routers recognize the topology change? (Some never do..)
Fairness and optimality: an inherently intractable problem. Definition of optimality usually doesn't consider fairness. Do we want to maximize channel usage? Minimize average delay?
When we look at routing in detail, we'll consider both adaptive--those that take current traffic and topology into consideration--and nonadaptive algorithms.
Introduction, Virtual and Datagram networks, study of router, IP protocol and addressing in the Internet, Routing algorithms, Broadcast and Multicast routing
Certainly! Let's break down the discussion on data communication into several parts. For a comprehensive understanding, we'll cover the basics, protocols, networking, security, and emerging trends. Each part will provide a more in-depth exploration of the topic.
### Part 1: Basics of Data Communication
Data communication is the process of exchanging information between two or more devices through a transmission medium such as cables, optical fibers, or wireless channels. It involves the use of protocols and technologies to ensure the reliable and efficient transfer of data.
#### 1.1 Components of Data Communication
Data communication systems consist of several key components, including:
- **Sender/Transmitter:** Initiates the communication by converting data into a signal.
- **Receiver:** Accepts the signal and converts it back into usable data.
- **Transmission Medium:** The physical path through which data travels (e.g., cables, airwaves).
- **Protocol:** A set of rules governing the exchange of data between devices.
#### 1.2 Types of Data Transmission
- **Analog vs. Digital:** Understanding the fundamental difference between analog and digital signals.
- **Simplex, Half-Duplex, and Full-Duplex:** Exploring the various modes of data transmission.
#### 1.3 Modulation and Multiplexing
- **Modulation:** The process of encoding digital information onto analog signals.
- **Multiplexing:** Techniques for combining multiple signals into a single transmission medium.
### Part 2: Data Communication Protocols
Data communication relies on standardized protocols to facilitate seamless interaction between devices. These protocols dictate the rules for data formatting, error checking, and synchronization.
#### 2.1 TCP/IP Protocol Suite
- **Transmission Control Protocol (TCP) and Internet Protocol (IP):** Fundamental protocols of the internet.
- **UDP (User Datagram Protocol):** A connectionless protocol for faster data transmission.
#### 2.2 OSI Model
- **Open Systems Interconnection model:** A conceptual framework for understanding network interactions divided into seven layers.
#### 2.3 Wireless Communication Protocols
- **Wi-Fi, Bluetooth, and NFC:** Popular wireless communication protocols.
### Part 3: Networking in Data Communication
Networking is a crucial aspect of data communication, encompassing the design, implementation, and management of interconnected systems.
#### 3.1 Types of Networks
- **LANs (Local Area Networks) and WANs (Wide Area Networks):** Differences and use cases.
- **MANs (Metropolitan Area Networks) and PANs (Personal Area Networks):** Exploring network scales.
#### 3.2 Network Topologies
- **Star, Bus, Ring, Mesh, and Hybrid Topologies:** Understanding how devices are interconnected.
#### 3.3 Network Devices
- **Routers, Switches, Hubs, and Modems:** Roles and functionalities in a network.
### Part 4: Security in Data Communication
As data communication becomes more prevalent, ensuring the security and
Illustration 2
Assume that the direct material inventory of Saron Furniture Factory amounts to Br. 248,000 at the beginning of the year i.e., as of July 1, 2014. Purchases of direct materials amounting Br. 440,000 was made and freight cost of Br. 3,200 is incurred during the year, and the amount of direct materials inventory at the end of the year is Br. 234,900.
Compute the direct materials used
Assume further that Saron Furniture Factory has beginning work in process of Br. 220,000 and ending work in process of Br. 263,200. The direct labor cost incurred in the year is Br. 875,000 and the different manufacturing overhead costs incurred during the year are given below:
Indirect labor
Br. 98, 600
Depreciation on factory equipment
44,600
Light and power
43,600
Depreciation of factory building
12,000
Insurance expense on factory properties
9,500
Property tax
19,500
Factory supplies
9,900
Total Manufacturing overhead cost
Br. 237, 700
Compute the cost of goods manufactured.
Assume also that the finished goods inventory at the beginning of the year was Br. 314,000 and the ending inventory of finished goods is Br. 364,000 for Saron Furniture Factory.
Compute the cost of goods sold
Illustration 2
Assume that the direct material inventory of Saron Furniture Factory amounts to Br. 248,000 at the beginning of the year i.e., as of July 1, 2014. Purchases of direct materials amounting Br. 440,000 was made and freight cost of Br. 3,200 is incurred during the year, and the amount of direct materials inventory at the end of the year is Br. 234,900.
Compute the direct materials used
Assume further that Saron Furniture Factory has beginning work in process of Br. 220,000 and ending work in process of Br. 263,200. The direct labor cost incurred in the year is Br. 875,000 and the different manufacturing overhead costs incurred during the year are given below:
Indirect labor
Br. 98, 600
Depreciation on factory equipment
44,600
Light and power
43,600
Depreciation of factory building
12,000
Insurance expense on factory properties
9,500
Property tax
19,500
Factory supplies
9,900
Total Manufacturing overhead cost
Br. 237, 700
Compute the cost of goods manufactured.
Assume also that the finished goods inventory at the beginning of the year was Br. 314,000 and the ending inventory of finished goods is Br. 364,000 for Saron Furniture Factory.
Compute the cost of goods sold
Illustration 2
Assume that the direct material inventory of Saron Furniture Factory amounts to Br. 248,000 at the beginning of the year i.e., as of July 1, 2014. Purchases of direct materials amounting Br. 440,000 was made and freight cost of Br. 3,200 is incurred during the year, and the amount of direct materials inventory at the end of the year is Br. 234,900.
Compute the direct materials used
Assume further that Saron Furniture Factory has beginning work in process of Br. 220,000 and e
UiPath Test Automation using UiPath Test Suite series, part 4DianaGray10
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The UiPath Test Manager overview with SAP heatmap webinar offers a concise yet comprehensive exploration of the role of a Test Manager within SAP environments, coupled with the utilization of heatmaps for effective testing strategies.
Participants will gain insights into the responsibilities, challenges, and best practices associated with test management in SAP projects. Additionally, the webinar delves into the significance of heatmaps as a visual aid for identifying testing priorities, areas of risk, and resource allocation within SAP landscapes. Through this session, attendees can expect to enhance their understanding of test management principles while learning practical approaches to optimize testing processes in SAP environments using heatmap visualization techniques
What will you get from this session?
1. Insights into SAP testing best practices
2. Heatmap utilization for testing
3. Optimization of testing processes
4. Demo
Topics covered:
Execution from the test manager
Orchestrator execution result
Defect reporting
SAP heatmap example with demo
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Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
Smart TV Buyer Insights Survey 2024 by 91mobiles.pdf91mobiles
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Encryption in Microsoft 365 - ExpertsLive Netherlands 2024Albert Hoitingh
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Create a campaign using Mailchimp with merge tags/fields
Send an interactive Slack channel message (using buttons)
Have the message received by managers and peers along with a test email for review
But there’s more:
In a second workflow supporting the same use case, you’ll see:
Your campaign sent to target colleagues for approval
If the “Approve” button is clicked, a Jira/Zendesk ticket is created for the marketing design team
But—if the “Reject” button is pushed, colleagues will be alerted via Slack message
Join us to learn more about this new, human-in-the-loop capability, brought to you by Integration Service connectors.
And...
Speakers:
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Charlie Greenberg, Host
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In this talk, I'll show you step-by-step how to secure your Kubernetes cluster for greater peace of mind and reliability.
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In this webinar, we will review the benefits of leveraging InfluxDB and Grafana when executing load tests and demonstrate how these tools are used to visualize performance metrics.
Length: 30 minutes
Session Overview
-------------------------------------------
During this webinar, we will cover the following topics while demonstrating the integrations of JMeter, InfluxDB and Grafana:
- What out-of-the-box solutions are available for real-time monitoring JMeter tests?
- What are the benefits of integrating InfluxDB and Grafana into the load testing stack?
- Which features are provided by Grafana?
- Demonstration of InfluxDB and Grafana using a practice web application
To view the webinar recording, go to:
https://www.rttsweb.com/jmeter-integration-webinar
Transcript: Selling digital books in 2024: Insights from industry leaders - T...BookNet Canada
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Link to video recording: https://bnctechforum.ca/sessions/selling-digital-books-in-2024-insights-from-industry-leaders/
Presented by BookNet Canada on May 28, 2024, with support from the Department of Canadian Heritage.
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The IoT and OT threat landscape report has been prepared by the Threat Research Team at Sectrio using data from Sectrio, cyber threat intelligence farming facilities spread across over 85 cities around the world. In addition, Sectrio also runs AI-based advanced threat and payload engagement facilities that serve as sinks to attract and engage sophisticated threat actors, and newer malware including new variants and latent threats that are at an earlier stage of development.
The latest edition of the OT/ICS and IoT security Threat Landscape Report 2024 also covers:
State of global ICS asset and network exposure
Sectoral targets and attacks as well as the cost of ransom
Global APT activity, AI usage, actor and tactic profiles, and implications
Rise in volumes of AI-powered cyberattacks
Major cyber events in 2024
Malware and malicious payload trends
Cyberattack types and targets
Vulnerability exploit attempts on CVEs
Attacks on counties – USA
Expansion of bot farms – how, where, and why
In-depth analysis of the cyber threat landscape across North America, South America, Europe, APAC, and the Middle East
Why are attacks on smart factories rising?
Cyber risk predictions
Axis of attacks – Europe
Systemic attacks in the Middle East
Download the full report from here:
https://sectrio.com/resources/ot-threat-landscape-reports/sectrio-releases-ot-ics-and-iot-security-threat-landscape-report-2024/
Dev Dives: Train smarter, not harder – active learning and UiPath LLMs for do...UiPathCommunity
💥 Speed, accuracy, and scaling – discover the superpowers of GenAI in action with UiPath Document Understanding and Communications Mining™:
See how to accelerate model training and optimize model performance with active learning
Learn about the latest enhancements to out-of-the-box document processing – with little to no training required
Get an exclusive demo of the new family of UiPath LLMs – GenAI models specialized for processing different types of documents and messages
This is a hands-on session specifically designed for automation developers and AI enthusiasts seeking to enhance their knowledge in leveraging the latest intelligent document processing capabilities offered by UiPath.
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Join us for an insightful dive into the world of FME parameters, a critical element in optimizing workflow efficiency. This webinar marks the beginning of our three-part “Essentials of Automation” series. This first webinar is designed to equip you with the knowledge and skills to utilize parameters effectively: enhancing the flexibility, maintainability, and user control of your FME projects.
Here’s what you’ll gain:
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- Practical Applications in FME Form: Delve into key user parameter types including choice, connections, and file URLs. Allow users to control how a workflow runs, making your workflows more reusable. Learn to import values and deliver the best user experience for your workflows while enhancing accuracy.
- Optimization Strategies in FME Flow: Explore the creation and strategic deployment of parameters in FME Flow, including the use of deployment and geometry parameters, to maximize workflow efficiency.
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We’ll wrap up with a glimpse into future webinars, followed by a Q&A session to address your specific questions surrounding this topic.
Don’t miss this opportunity to elevate your FME expertise and drive your projects to new heights of efficiency.
How world-class product teams are winning in the AI era by CEO and Founder, P...
Switching techniques
1. Switching Techniques
In large networks there might be multiple paths linking sender
and receiver. Information may be switched as it travels through
various communication channels. There are three typical
switching techniques available for digital traffic.
• Circuit Switching
• Message Switching
• Packet Switching
2. Circuit Switching
• Circuit switching is a technique that directly connects the
sender and the receiver in an unbroken path.
• Telephone switching equipment, for example, establishes a
path that connects the caller's telephone to the receiver's
telephone by making a physical connection.
• With this type of switching technique, once a connection is
established, a dedicated path exists between both ends
until the connection is terminated.
• Routing decisions must be made when the circuit is first
established, but there are no decisions made after that time.
3. Circuit Switching
• Circuit switching in a network operates almost the same
way as the telephone system works.
• A complete end-to-end path must exist before
communication can take place.
• The computer initiating the data transfer must ask for a
connection to the destination.
• Once the connection has been initiated and completed to the
destination device, the destination device must acknowledge
that it is ready and willing to carry on a transfer.
4. Circuit switching
Advantages:
• The communication channel (once established) is dedicated.
Disadvantages:
• Possible long wait to establish a connection, (10 seconds,
more on long- distance or international calls.) during which
no data can be transmitted.
• More expensive than any other switching techniques,
because a dedicated path is required for each connection.
• Inefficient use of the communication channel, because the
channel is not used when the connected systems are not
using it.
5. Message Switching
• With message switching there is no need to establish a
dedicated path between two stations.
• When a station sends a message, the destination address is
appended to the message.
• The message is then transmitted through the network, in its
entirety, from node to node.
• Each node receives the entire message, stores it in its entirety
on disk, and then transmits the message to the next node.
• This type of network is called a store-and-forward network.
6. Message Switching
A message-switching node is typically a general-purpose
computer. The device needs sufficient secondary-storage
capacity to store the incoming messages, which could be long.
A time delay is introduced using this type of scheme due to
store- and-forward time, plus the time required to find the next
node in the transmission path.
7. Message Switching
Advantages:
• Channel efficiency can be greater compared to circuit-
switched systems, because more devices are sharing the
channel.
• Traffic congestion can be reduced, because messages may be
temporarily stored in route.
• Message priorities can be established due to store-and-forward
technique.
• Message broadcasting can be achieved with the use of
broadcast address appended in the message.
8. Message Switching
Disadvantages
• Message switching is not compatible with interactive
applications.
• Store-and-forward devices are expensive, because they
must have large disks to hold potentially long messages.
9. Packet Switching
• Packet switching can be seen as a solution that tries to combine the
advantages of message and circuit switching and to minimize the
disadvantages of both.
• There are two methods of packet switching: Datagram
and virtual circuit.
10. Packet Switching
• In both packet switching methods, a message is broken into
small parts, called packets.
• Each packet is tagged with appropriate source and destination
addresses.
• Since packets have a strictly defined maximum length, they
can be stored in main memory instead of disk, therefore access
delay and cost are minimized.
• Also the transmission speeds, between nodes, are optimized.
• With current technology, packets are generally accepted onto
the network on a first-come, first-served basis. If the network
becomes overloaded, packets are delayed or discarded
(``dropped'').
11. Packet size
• The size of the packet can vary from 180 bits, the size for the
Datakit® virtual circuit switch designed by Bell Labs for
communications and business applications; to 1,024 or
2,048 bits for the 1PSS® switch, also designed by Bell Labs
for public data networking; to 53 bytes for ATM switching,
such as Lucent Technologies' packet switches.
12. Packet switching
• In packet switching, the analog signal from your phone is
converted into a digital data stream. That series of digital
bits is then divided into relatively tiny clusters of bits,
called packets. Each packet has at its beginning the digital
address -- a long number -- to which it is being sent. The
system blasts out all those tiny packets, as fast as it can,
and they travel across the nation's digital backbone
systems to their destination: the telephone, or rather the
telephone system, of the person you're calling.
• They do not necessarily travel together; they do not travel
sequentially. They don't even all travel via the same route.
But eventually they arrive at the right point -- that digital
address added to the front of each string of digital data --
and at their destination are reassembled into the correct
order, then converted to analog form, so your friend can
understand what you're saying.
13. Packet Switching: Datagram
• Datagram packet switching is similar to message switching in
that each packet is a self-contained unit with complete
addressing information attached.
• This fact allows packets to take a variety of possible paths
through the network.
• So the packets, each with the same destination address, do not
follow the same route, and they may arrive out of sequence at
the exit point node (or the destination).
• Reordering is done at the destination point based on the
sequence number of the packets.
• It is possible for a packet to be destroyed if one of the nodes on
its way is crashed momentarily. Thus all its queued packets may
be lost.
14. Packet Switching:Virtual Circuit
• In the virtual circuit approach, a preplanned route is established
before any data packets are sent.
• A logical connection is established when
a sender send a "call request packet" to the receiver and
the receiver send back an acknowledge packet "call accepted
packet" to the sender if the receiver agrees on conversational
parameters.
• The conversational parameters can be maximum packet sizes,
path to be taken, and other variables necessary to establish and
maintain the conversation.
• Virtual circuits imply acknowledgements, flow control, and error
control, so virtual circuits are reliable.
• That is, they have the capability to inform upper-protocol layers
if a transmission problem occurs.
15. Packet Switching:Virtual Circuit
• In virtual circuit, the route between stations does not mean that
this is a dedicated path, as in circuit switching.
• A packet is still buffered at each node and queued for output over
a line.
• The difference between virtual circuit and datagram approaches:
With virtual circuit, the node does not need to make a routing
decision for each packet.
It is made only once for all packets using that virtual circuit.
16. Packet Switching: Virtual Circuit
VC's offer guarantees that
the packets sent arrive in the order sent
with no duplicates or omissions
with no errors (with high probability)
regardless of how they are implemented internally.
17. Advantages of packet switching
Advantages:
• Packet switching is cost effective, because switching
devices do not need massive amount of secondary
storage.
• Packet switching offers improved delay characteristics,
because there are no long messages in the queue
(maximum packet size is fixed).
• Packet can be rerouted if there is any problem, such as,
busy or disabled links.
• The advantage of packet switching is that many
network users can share the same channel at the same
time. Packet switching can maximize link efficiency by
making optimal use of link bandwidth.
18. Disadvantages of packet switching
Disadvantages:
• Protocols for packet switching are typically more complex.
• It can add some initial costs in implementation.
• If packet is lost, sender needs to retransmit the data.
• Another disadvantage is that packet-switched systems still
can’t deliver the same quality as dedicated circuits in
applications requiring very little delay - like voice
conversations or moving images.