University of Sargodha BS 3* Term Examination 2016 Subject: 1. I Paper: Computer Communication & Network (CMP-2540) Time Allowed: 2:30 Hours

University of Sargodha

BS 3* Term Examination 2016

Subject:

1. I Paper: Computer Communication & Network (CMP-2540)

Time Allowed: 2:30 Hours

Maximum Marks: 80

Note: Objective part is compulsory. Attempt any four questions from subjective parts.

Objective Part

QI. Write short answers of the following questions in 2-3 lines only

(16*2=32)

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ун1.

Difference between signaling rate and data ratc?

List two wireless network protocols

What is connection less oriented protocol also list the name of that protoce!?

What is frequency domain analysis for signal?

Explain scrambling with suitable example.

What is SNR?

How twists in per unit length reduce the noise in twisted pair cable?

Explain synchronous communication.

Explain delta modulation.

What is flow control and which layer is responsible for this?

What is parity bit? Why it is used?

What are the draw backs of infra-red communication?

What is the difference between Manchester and Differential Manchester?

What is DSL and list down its various types?

Explain soft switch architecture

Define VLANs.

Subjective Part_ (12*4=48)

Q2. Discuss wired LAN topology with suitable examples.

Q3. What is unguided media? Write a note on

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a. Infra-red b. Microwaves to

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Q.4. Explain Wireless LAN Networks and discuss the architecture and services of IBEE 802.11.

Q.5. Discuss virtual circuits in detail and provide its example.

Q. Discuss various generations of cellular networks along with the services provided by every

generation.

O. Differentiate OST and TCP/P models.

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