Tuesday, February 7, 2023

Dr. A.P.J. Abdul Kalam University MCA II Sem Computer Network [MCA202] June 2021 Question Paper

Dr. A.P.J. Abdul Kalam University

Master of Computer Application

Second Semester Main Examination, June-2021

Computer Network [MCA202]

Time: 3:00 Hrs _______ Max Marks 70

Note: Answer any five questions. All questions carry equal marks.

Q.1 (a) Describe the ISO-OSI model with its different layers and their functions?

(b) Explain the communication media and principles IEEE standards?

Q.2 (a) What is a routing protocol? Explain in detail about the protocol data

units? What is its Key Element?

(b) What is error control? Explain CRC with an example?

Q.3 (a) Explain Dijkstra’s algorithm with an example.

(b) Explain the Bellman Ford algorithm for routing in network with an

example.

Q.4 (a) Explain CSMA and CSMA/CD protocols? Also discuss channel

allocation?

(b) Define ATM? Describe the ATM service and Architecture.

Q.5 (a) What is DNS? How resources records and maintained in DNS?

(b) What is SNMP? Explain different security level implementing in SNMP?

Q.6 (a) Explain Network security. Describe cryptography.

(b) Why do HTTP, FTP, SMTP, POP3and IMAP run on top of TCP rather

than on UDP? Discuss.

Q.7 (a) Give the Difference between IPV4 and IPV6 in details?

(b) What is IP addressing? What are the different addresses?

Q.8 Write short notes on:

(a) DQDB Protocol

(b) FDDI Protocol

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