ECT Introduction to Data Communications and Networking

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Hello, I need to answer theses 10 question perfuctly I want A in this homework 2 mutible choises and 8 are writing answer and they must be enough and properit to the question to earn full mark DUE IN 10 h from now max

 

 

1-List three ways in which the OSI model, over the years, has facilitated the growth in network communications.
 
2-The ____ layer offers a way to set up half- and full-duplex communications.
What is the difference between unicast and multicast packets?  Which is used more often by an application?

4-How does window size provide flow control?

5- At each layer of the OSI model, data is appended to the original message and then sent on to the next lower layer. What is this process called?
Discuss the two appraoches toward congestion control.

7- Describe TCP's connection establishement and closure.

8-Why do we need the session layer.

9- How does the transport layer use stop and wait to control flow of data.

10- What are the functions of the presentation layer.
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