Computer Communication and Network MSC IT 2020 UOS

2.1.

University of Sargodha

M. Sc. 2»l Semester/Term Examination 2020

Paper: Computer Cornmunication & Network (CMP-2540)

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Maximum Marks: 8U

any three questions from subid

Objective Pari - (Computsorystadhi.com.urt

Write short answers of the following in 2-3 lines each on your answer sheet

What are the components of data cornmunication system?

(2*16)

114

What is compression? Which layer is responsible for compression?

What is multimode step index?

What type of addresses are used in Network and Data Link layer?

Define digital to an alog conversion.

Vil.

How does sky propagation differ from life-of-sight propagdion?

viii.

What is the goal of multiplexing?

ation?

Ix.

Difference betwren Half duplex and full-duples Y

Define two maiycategories of network

Which connect ors are used in liber optic cable?

XI-

What are the two types of line configuration?

xii. " Define infrared waves, Give an example.

xIL.

What is hand off?

xiv.- What is the difference between switch and routar?

xv. V/hy are protocols needed?

xvi.- I low does

ustadni cold le bit error differ from burst error?

(3"16)

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Explain OSI model with functionality of each layer.

Discuss the steps in volved in a typical cail originated from a mobile user to a fixed subscr

What are the connectors, advantages and disadvantages of fiber optic cable?

Discuss the techniques used in serial trinsmission.

Discuss transmission impairments in detail.

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