Download PTU MCA 2020 March 2nd Sem 72879 Data Communication And Networks Question Paper

Roll No.

Total No. of Pages : 02

Total No. of Questions : 09

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MCA (2015 & Onward) (Sem.-2)

DATA COMMUNICATION AND NETWORKS

Subject Code : MCA-204

M.Code: 72879

Time: 3 Hrs.

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Max. Marks : 60

INSTRUCTIONS TO CANDIDATES :

1. SECTIONS-A, B, C & D contains TWO questions each carrying TEN marks each and students have to attempt any ONE question from each SECTION.
2. SECTION-E is COMPULSORY consisting of TEN questions carrying TWENTY marks in all.

SECTION-A

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1. What are the major components of data communication? Explain the role of Modulation and Multiplexing techniques.
2. Compare OSI and TCP/IP reference models layer by layer.

SECTION-B

1. Discuss the following function of Data link layer:
   1. Error Control
   2. Framing

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2. Explain the following IEEE standards:
   1. IEEE 802.4
   2. IEEE 802.5

SECTION-C

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1. Describe the following Routing algorithm:
   1. Shortest Path routing
   2. Hierarchical routing
2. How Congestion control is achieved using leaky bucket algorithm? Explain.

SECTION-D

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1. Discuss the procedure for establishing and releasing connection by transport layer in detail.
2. Write short notes on the following :
   1. Domain Name System
   2. HTTPS

SECTION-E

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1. Answer briefly :
   1. Compare the working of LAN and MAN.
   2. How the communication satellites are deployed?
   3. What is the role of protocols?
   4. List the different channel allocation protocols.
   5. Briefly explain the working of ping command.

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   6. How ARP protocol works?
   7. What is the significance of buffering?
   8. Compare TCP and UDP.
   9. List the drawbacks of wireless communication.
   10. How netstat command is used?

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NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any page of Answer Sheet will lead to UMC against the Student.

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