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Seat No.: Enrolment
GUJARAT TECHNOLOGICAL UNIVERSITY
PDDC SEMESTER VIII- EXAMINATION SUMMER 2017
Subject Code: X81101 Date: 27/04/2017
Subject Name: Data Communication and Networking
Time: 10.30AM to 01.00PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1

Explain OSI model for computer network with necessary diagram.
07

Define following Terms
Computer Network DNS Frame Relay
Gateway Protocol IP Address
Physical Address
07
Q.2

Explain difference between TDM, FDM and CMDA
07

Explain Sliding window protocol with necessary diagram.
07
OR

Explain bit stuffing and byte stuffing with suitable diagram
07
Q.3

Explain public switch telephone network with necessary diagram.
07

Explain difference between CSMA/CD and CSMA/CA.
07
OR
Q.3

Write short note on Bluetooth.
07

Give difference between Router, Switch, Hub, Bridges, Gateway.
07
Q.4

What is rouing? Explain shortest path routing algorithm with suitable example.
07

List the design issues of transport layer and explain each issue in short.
07
OR
Q.4

Explain the channel allocation problem. Also explain its solution in short.
07
Q.4

Explain TCP/IP protocol with suitable figures.
07
Q.5

Explain SMTP and HTTP protocol in brief.
07

What is cryptography? Explain public key algorithm.
07
OR
Q.5

Explain in brief.
Firewall Web security.
07

Define World Wide Web. Draw and Explain architectural overview of the World Wide Web.
07