D 10000EC407122002 Pages: 2

Reg No.: Name:
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY

Seventh Semester B.Tech Degree Regular and Supplementary Examination December 2021 (2015 Scheme)

Course Code: EC407
Course Name: COMPUTER COMMUNICATION
Max. Marks: 100 Duration: 3 Hours
PARTA
Answer any two full questions, each carries 15 marks. Marks
1 a) Explain the functions of OSI model with a neat diagram. (10)
b) Differentiate synchronous transmission from asynchronous transmission. (5)
2 a) Explain with a neat sketch (a) Coaxial cable (b) Fiber optic cable. (6)
b) Explain using flow diagram how the collision is avoided in CSMA/CA. (9)
3 9) Explain about TCP/IP protocol suite. (8)

b) Discuss IEEE802.3 MAC frame format in detail .What are the restrictions (7)
imposed on minimum and maximum lengths of 802.3.
PART 13
Answer any two full questions, each carries 15 marks.
4 a) Explain about ICMP protocol. Explain how the error reporting is possible in (8)
ICMP.
0) Explain the limitations of distance vector protocol. Explain the solutions to (7)
overcome these limitations.
5 a) Explain the fuctionalities of the network layer. Also explain the IPv4 packet (10)
format with a neat sketch.
b) List the different networking devices in detail. (5)
6 a) Explain routing table. State the difference between static routing table and (7)

dynamic routing table.

b) Explain the Border Gateway Protocol (BGP) protcol with an example. (8)
PART ட்‌
Answer any two full questions, each carries 20 marks.
7 a) Explain PGP and TLS in detail. (6)
b) Explain how Telnet establishes connection to a remote system. (6)
c) With ೩ suitable diagram explain the features of UDP. (8)

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