CS601-Assignment No. 01 Data Communication (Non Graded) Solution and Discussion 2013

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Question 1: (10 Marks)

Which of the layer(s) of the OSI model perform(s) the following functions?

Sr. No. Functions OSI Layer(s)
1 Route determination
2 Reliable process to process delivery
3 Provides user services such as email and file transfer
4 Error correction and retransmission
5 Establishes, manages and terminates session
6 Defines frames
7 Transmission of bits across medium
8 Format and code conversion services
9 Ensures reliable transmission of data
10 Communicates directly with user’s application program

Question 2: (10 Marks)

Discuss the consequences if a connection fails in each of the following five network topologies having four devices.

1. Devices arranged in a mesh topology
2. Devices arranged in a star topology (not including the hub)
3. Devices arranged in a bus topology
4. Devices arranged in a ring topology
5. Devices arranged in a dual ring topology


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