Download GTU B.Tech 2020 Summer 4th Sem 2140709 Computer Networks Question Paper

Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Summer 4th Sem 2140709 Computer Networks Previous Question Paper

Seat No.: ________
Enrolment No.___________


GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER? IV EXAMINATION ? SUMMER 2020
Subject Code: 2140709 Date:02/11/2020
Subject Name: COMPUTER NETWORKS
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.


Marks
Q.1 (a) Differentiate between Connection oriented and Connectionless services.
03

(b) List out & discuss various types of addresses used in internetworking.
04

(c) Draw & explain the Internet protocol stack. Write down various duties performed
07
by each layer.


Q.2 (a) What is the role of Domain Name Server (DNS) in Internet?
03

(b) Compare UDP with TCP.
04

(c) Draw & explain general format of two different types of HTTP message.
07


OR


(c) List out & discuss in detail various physical media used for accessing the
07
network.
Q.3 (a) Compare Go-Back-N ARQ with Selective Repeat ARQ.
03

(b) How UDP checksum value is calculated? Explain with suitable example.
04

(c) Draw & explain each field of TCP segment header.
07


OR

Q.3 (a) Compare flow control with congestion control.
03

(b) Explain the concept of pipelining in brief. List any two pipelined RDT protocols.
04

(c) Explain TCP congestion control algorithm with the help of following terms &
07
suitable diagram:
1.) Slow start, 2.) Congestion avoidance, 3.) Fast recovery, 4.) AIMD.
Q.4 (a) Compare virtual-circuit networks with datagram networks.
03

(b) Briefly explain the terms: CIDR & classful addressing.
04

(c) Draw & explain each field of IPv4 datagram.
07

OR

Q.4 (a) Differentiate between the forwarding and the routing.
03

(b) Draw & ex
plain in brief router architecture.
04

(c) What is the role of routing algorithms at network layer? Illustrate the operation of
07
Distance Vector routing algorithm for the simple 3-node network.
Q.5 (a) Justify how slotted ALOHA is better than pure ALOHA.
03

(b) How DHCP works? Explain in brief.
04

(c) Draw Ethernet frame structure and explain each field in detail.
07


OR
Q.5 (a) Compare physical LAN with virtual LAN.
03
(b) How ARP works? Explain in brief.
04
(c) Given the dataword 1010101010 and the divisor 10101,
07
1. Show the generation of codeword at the sender site.
2. Show the generation of dataword at receiver site (assuming no errors).

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