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APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
SEVENTH SEMESTER B.TECH DEGREE EXAMINATION(R&S), MARCH 2020

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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) Witha suitable diagram explain the fundamentals of TCP/IP protocol Suite. (8)
b) Explain about (a) Coaxial cable (b) Fibre optic cable. (7)
2 a) Explain the error detection using CRC. (8)
b) Explain about the MAC sub layers defined by IEEE 802.11 (7)
3 9) Explain how collision is avoided in CSMA/CA. (10)
b) Explain about star and bus topologies. (5)
PART B
Answer any two full questions, each carries 15 marks.
4 a) Explain the functionalities of network layer and IP packet format. (10)
b) Explain the forwarding of packet in network layer. (5)
5 9) Explain the formation of shortest path tree using Dijkstra’s Algorithm. (10)
b) Explain about classful and classless addressing. (5)
6 a) What is VLAN? Explain its configurations. (7)
b) Explain how Link State Routing is implemented in OSPF protocol. (8)
PART ட
Answer any two full questions, each carries 20 marks.
7 a) Explain about TCP segment format. (8)
b) Explain how DMZ helps in network security. (6)
c) Explain about SNMP. (6)
8 a) Discuss how IPSec secures network layer communication. (8)
b) Explain the various intrusion detection systems. (6)
c) Explain about (a) PGP (b) SSL (6)
9 a) Explain congestion control measures implemented in transport layer. (8)
b) Explain the architecture of WWW. (6)
c) Explain about SMTP. (6)

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