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Gujarat Technological University

This document outlines the examination details for the Computer Networks subject at Gujarat Technological University for the BE Semester-IV Summer 2024. It includes instructions for the exam, a breakdown of questions covering various topics such as network delays, OSI vs TCP/IP models, DNS, HTTP, TCP protocols, subnetting, and routing algorithms. The exam consists of multiple questions with varying marks, emphasizing both theoretical concepts and practical applications in computer networking.

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10 views2 pages

Gujarat Technological University

This document outlines the examination details for the Computer Networks subject at Gujarat Technological University for the BE Semester-IV Summer 2024. It includes instructions for the exam, a breakdown of questions covering various topics such as network delays, OSI vs TCP/IP models, DNS, HTTP, TCP protocols, subnetting, and routing algorithms. The exam consists of multiple questions with varying marks, emphasizing both theoretical concepts and practical applications in computer networking.

Uploaded by

dixifeg781
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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Enrolment No.

/Seat No_______________

GUJARAT TECHNOLOGICAL UNIVERSITY


BE - SEMESTER–IV (NEW) EXAMINATION – SUMMER 2024
Subject Code:3144302 Date:20-07-2024
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.
4. Simple and non-programmable scientific calculators are allowed.
MARKS
Q.1 (a) Explain various delays at router in a packet-switched network. 03
(b) Differentiate between OSI model & TCP/IP model. 04
(c) Discuss circuit switching vs. packet switching for their concept, application, 07
advantages & disadvantages in detail.

Q.2 (a) What is DNS? Explain its Distributed, Hierarchical Database. 03


(b) Differentiate between TCP & UDP protocols. 04
(c) What is HTTP? Differentiate its persistent and non-persistent types with 07
request-response behavior of HTTP.
OR
(c) Explain concept of Web Caching with its pros & cons. Explain what is stale 07
web cache & how it is resolved using conditional get method.

Q.3 (a) State which application layer & transport layer protocols are utilized by below 03
services:
Email, web, Name translation.
(b) Explain congestion control in TCP. 04
(c) Discuss Go-Back-N(GBN) protocol with example. 07
OR
Q.3 (a) State port numbers for below protocols. 03
HTTP, HTTPS, SMTP, POP3, IMAP, DNS.
(b) Explain rdt 3.0 sender with its FSD. 04
(c) Discuss Selective Repeat (SR) protocol with example. 07

Q.4 (a) How many subnets can be created for the subnet mask 255.255.255.224? 03
Which IP address class these subnets belong to?
(b) Explain IPV4 datagram format and importance of each field. 04
(c) Discuss Distance Vector Routing algorithm with its pros, cons, applications 07
and calculate vector tables for nodes x, y & z for below network graph.

OR

Q.4 (a) Explain packet fragmentation with example. 03


(b) What is sub netting? Why it is required? 04

1
(c) Discuss Link State Routing protocol with its pros, cons, applications and 07
calculate least cost path and forwarding table for below network graph.

Q.5 (a) Draw and explain Ethernet frame structure. 03


(b) Explain CSMA as random-access protocol. 04
(c) Discuss Cyclic Redundancy Check (CRC) method with example. 07
OR
Q.5 (a) Explain concept of VLAN. 03
(b) Explain slotted ALOHA with its pros & cons 04
(c) Discuss Parity Check & Check summing methods of error detection. 07

*************

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