64234-mt----communication Networks

NR

Code No: 64234/MT

M.Tech. – II Semester Regular Examinations, September, 2008 COMMUNICATION NETWORKS (Communication Systems) Time: 3hours

Max. Marks:60 Answer any FIVE questions All questions carry equal marks ---

1.

Describe circuit switched and packet switched networks with a neat sketch and compare them.

2.

Describe ISO-OSI layered architecture? Explain functions and goals of each layer?

3.a) b)

Describe various architectures for packet switching? Describe about ARQ schemes and their analysis?

4.

Describe all ALOHA schemes and clearly derive ALOHA throughput ‘S’ and also explain throughput versus offered traffic graph of ALOHA?

5.

Describe a model for the flow of circuit switched and packet switched traffic in networks and their analysis?

6.

Describe OSPF and BGP.

7.

Describe about CSMA/CD and CSMA/CA schemes.

8.

Write short notes on the following: a) TCP/IP networking b) ATM c) Adhoc networks. ^*^*^