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2 C 86180

Part C

Answer any five questions.
Each question carries 5 marks.

Differentiate between packet switching and message switching.
Explain about different network topologies in detail.

Give an account on wireless LANs.

Compare and contrast CSMA/CD and CSMA/CA.

What are the different internetworking devices ? Explain any two.
What is an IPv4 address Scheme ? Explain its classes.

Explain the structure of TCP header with suitable diagram.

Write a note on RSA cryptosystem.
(5 x 5 = 25 marks)

Part D

Answer any three questions.
Each question carries 10 marks.

Compare and contrast OSI reference model and TCP/P reference model.

What is CRC ? If the generating polynomial for CRC code is X* + X° + 1 and message word
is 11110000, determine check bits and coded word. /

Describe any two routing algorithms.
Explain the functions of transport layer.

Explain about RSA digital signature scheme in detail.
(3 x 10 = 30 marks)