2 C 60094

III. Answer any five questions. Each question carries 4 marks :

16
37
18
19
20
21
22
23

Differentiate CSMA/CD and CSMA/CA.
Explain the network hardware in detail.
Define blocking in a switched network.
How is a repeater different from an amplifier ?
Explain Dijkstra’s algorithm.
Discuss the concept of redundancy in error detection and correction.
What is the difference between network layer delivery and transport layer delivery ?
What do you mean by remote logging ?
(5 x 4= 20 marks)

IV. Answer any five questions. Each question carries 8 marks :

24
25
26
27
28
29
30
31

Explain the different transmission mediums used in networks.
Discuss open loop and closed loop congestion control.
Explain the various random access protocols in detail.
Explain different error control mechanisms used in networks.
Discuss different random access methods in detail.
Discuss the architecture and services of electronic mail.
Explain Cryptography and its categories in detail.
Explain the following protocols :
a) UDPb) TCP c) SCTP.
(5 x 8 = 40 marks)