Computer Communication Networks - May 2013

Electronics Engineering (Semester 7)

TOTAL MARKS: 80
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Assume data if required.
(4) Figures to the right indicate full marks.

Attempt any four

1 (a) Give reasons for the layered protocols.(5 marks) 1 (b) Explain how microwave communication work.(5 marks) 1 (c) Explain various LAN topologies.(5 marks) 1 (d) What us sliding window protocol? Where is it applicable?(5 marks) 1 (e) Explain the general principle of congestion control.(5 marks) 2 (a) Explain Circuit switching, Packet switching and Message switching.(10 marks) 2 (b) Compare performance characteristics of co-axial, twisted pair and fiber optic transmission media.(10 marks) 3 (a) Explain in detail OSI model.(10 marks) 3 (b) What is DSL technology? Explain various DSL technologies and compare (10 marks) 4 (a) Draw the block diagram of SONET and explain its operation. Also explain the SONET frame.(10 marks) 4 (b) State and explain frame types in HDLC.(10 marks) 5 (a) What is Ethernet? Explain fast Ethernet specification. Also explain CSMA-CD in detail.(10 marks) 5 (b) What are different types of routing? Explain link state routing.(10 marks) 6 (a) Explain the following network connecting Devices:
1. Switches
2. Routers
3. Gateway
4. Hub
5. Bridge
(10 marks) 6 (b) Explain different ARQ techniques(10 marks)

Explain the following:

7 (a) TCP/IP model.(5 marks) 7 (b) Leased Line concept(5 marks) 7 (c) ISDN(5 marks) 7 (D) IPv4.(5 marks)