Computer Communication and Network BS/MPhil Computer Science/MS Computer Science 3 Semester/Term University Of Sargodha (UOS) 2023

University of Sargodha

BS 3rd Term Examination 2023

Subject: Computer Science

Time Allowed: 02:30 Hours

Paper: Computer Networks (CMPC-205)

Note:

Q.1.

Maximum Marks: 40

Objective part is compulsory. Attempt any three questions from subjective part.

Objective Part

(Compulsory)

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

Why do we need protocol on the network?

ii.

ili.

iv.

V.

vi.

vil.

viii.

What is the use of the POP protocol?

What is the use of FTP protocol?

What is data communication?

What is the functionality of the SMPT protocol?

Does all traffic running on the Internet use TCP?

Compare the address space between IPv4 and IPv6. How many bits are used in each?

What is CDMA?

(2*8)

Q2.

Q.3.

Q.4.

Q.5.

Q.6.

Subjective Part

(3*8)

What is OSI Model? Explain the functionality of each layer.

Write down the difference between Guided Media and Un Guided Media.

What are the objectives and functions of the second generation of the cellular telephony network?

Explain the working of network devices. Also write notes on the hub, switch, and bridge.

What are the pros and cons of Bus topology, Ring topology and Tree topology?

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