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Seat No.: Enrolment
GUJARAT TECHNOLOGICAL UNIVERSITY
PDDC SEMESTER-VIII EXAMINATION WINTER 2017
Subject Code: X81101 Date:02/11/2017
Subject Name: Data Communication Networking
Time:02:30PM TO 5:00PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1

List and explain the layer of Internet Model and OSI Model.
07

Explain the types of Ethernet explaining the distance limitations of all of them. Why this distance limitation exists in Ethernet?
07
Q.2

List the traditional switching methods. What are the most common today?
07

Briefly describe the services provided by the network layer.
07
OR

Discuss the Ethernet Frame format, Fast Ethernet Gigabit Ethernet Implementations.
07
Q.3

Define piggybacking and its usefulness
07

Compare and Contrast HDLC and PPP
07
OR
Q.3

Distinguish between FDMA, TDMA and CDMA?
07

Explain connection oriented and connection less networks.
07
Q.4

List the elements of Transport Protocol and explain any three of them.
07

Explain Addressing in Network Layer. What is the difference between Classful and Classless addressing?
07
OR
Q.4

Explain importance of Router, Gateway, Switch, Hub, Bridge and Repeater
07

Explain Distance Vector routing algorithm with necessary figures.
07
Q.5

What is Quality of Service? What is its significance? List the techniques available to improve Quality of Service and explain any two of them in detail.
07

Discuss HTTP in detail, which way HTML is helpful in implanting HTTP?
07
OR
Q.5

Explain Key Management in implementing security in networks.
07

What are digital signatures? How they are used/implemented for using over networks.
07