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University of Sargodha BS 3° Term Examination 2016 Subject: Computer Science Paper: Computer Communication & Networks (CMP-2540) Time Allowed: 0:30 Hours usto Maximum Marks: 80

University of Sargodha BS 3° Term Examination 2016 Subject: Computer Science Paper: Computer Communication & Networks (CMP-2540) Time Allowed: 0:30 Hours usto Maximum Marks: 80 — page 1

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Paper text

University of Sargodha

BS 3° Term Examination 2016

Subject: Computer Science Paper: Computer Communication & Networks (CMP-2540)

Time Allowed: 0:30 Hours

usto

Maximum Marks: 80

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Objective Part Compulsory

Q-1: Answer the following question briefly.

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2x16 = 32

1: Define a network.

2: What is encryption? Which layer is responsible for encryption?

3: What is refraction?

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

5. Define digital to analog conversion.

6: Which two layers offer reliability?

7: What is the goal of multiplexing?

8: Difference between Half-duplex and full-duplex?

9: Define two main categories of network.

10: Why twisted pair cable is twisted?

11. What are the two types of line configuration?

12:Define infrared waves. Give an example.

13. What is handoff?

14 Define throughput and band width

15: Why are protocols needed?

16. Define scrambling.

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Subjective

Attempt any four (4) questionsustad

Q-2:- Explain OSI model with functionality of each layer.

VLAN?

Q-4:/ What are the advantages and disadvantages of fiber optic cable?

Q-5:/ What is multiplexing? Explain the categories of multiplexing.

Q-6: Explain the technologies of xDSL.

Q-7: Discuss transmission impairments in islaWebsite: ustadni.com