Download GTU B.Tech 2020 Winter 5th Sem 3150710 Computer Networks Question Paper

Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Winter 5th Sem 3150710 Computer Networks Previous Question Paper

Seat No.: ________
Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER?V (NEW) EXAMINATION ? WINTER 2020
Subject Code:3150710 Date:01/02/2021
Subject Name:Computer Networks
Time:10:30 AM TO 12:30 PM Total Marks: 56
Instructions:
1. Attempt any FOUR questions out of EIGHT questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.


Marks
Q.1 (a) Explain how bit rate and baud rate are related with respect to Ethernet.
03

(b) Differentiate between connection oriented versus connection less services in
04
networks.

(c) Explain the working of binary count down MAC layer protocol in detail.
07


Q.2 (a) Explain how multicasting differs from multiple unicasting in networks.
03

(b) Discriminate fully qualified domain name from partially qualified domain
04
name.

(c) Explain the working of CSMA/CD protocol in detail.
07
Q.3 (a) A Bit steam 100100 is to be transmitted using standard CRC method with
03
divisor value x3+x2+1. Generate the CRC code word.

(b) How switch device is different from the router?
04

(c) Explain the problem of Count-to-infinity with example in distance vector
07
routing algorithm.




Q.4 (a) What is meant by encapsulation at transport layer?
03

(b) Explain flow and error control in TCP.
04

(c) What do you mean by sub-netting and super-netting? Explain it with example
07
Q.5 (a) Explain NAT (Network Address Translation) as a solution to IP address
03
depletion problem.

(b) What is the minimum and maximum size of the TCP and UDP segment?
04

(c) Explain leaky bucket algorithm for the network traffic shaping.
07



Q.6 (a) Is deadlock possible in TCP? If yes, when?
03

(b) What is route aggregation? How it can be useful in Internet?
04

(c) Explain the significance of the following flags present in TCP segment header:
07
1) URG 2) ACK 3) PSH 4) RST 5) SYN 6) FIN
Q.7 (a) How the Jitter is different from the delay in streaming applications?
03

(b) Explain the following TCP socket system calls:
04
1) socket() 2) bind()
3) listen() 4) accept()

(c) Give the well defined port number for the following protocols:
07
1) SMTP 2) DNS 3) HTTP 4) POP3
5) TELNET 6) HTTPS 7) SSH



Q.8 (a) Is data compression is necessary at the presentation layer of OSI reference
03
model? Explain it with proper reason.
(b) What do you mean by stream and datagram sockets?
04
(c) Explain the hierarchical DNS system
07

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