Dr.A.P.J.Abdul Kalam University BE V SEM ALL BRANCH Data Communication [CS-501] Dec - 2020 Question Paper

Dr.A.P.J.Abdul Kalam University 

Bachelor of Engineering

Fifth Semester Main Examination, Dec-2020

Data Communication [CS-501]

Branch: CSE

Time: 3:00 Hrs Max Marks 70

Note : 1. Attempt any five questions out of eight.

2. All question carry equal marks.

Q.1 (a) What is data communication? Define its components. Discuss Data transmission and modes.

 (b) Explain why gateway is called protocol converter and also explain its working in detail?

Q.2 (a) Differentiate between an analog and a digital transmission methods.

 (b)What is Multiplexing? In what situation multiplexing is used? Also distinguish between

synchronous and statistical TDM?

Q.3 (a) Difference between circuit switching and packet switching.

(b) Discuss the various error detection and correction method.

Q.4 (a) What is CRC? Explain CRC with suitable example?

. (b) What is the purpose of multiplexing? Differentiate between time division multiplexing and

frequency division multiplexing,

Q.5 (a) Explain the following:

 i) Active Hubs ii) Passive Flubs iii) Repeater iv) Bridge

 (b) Compare FDM, TDM and WDM?

Q.6 (a) What are Hamming Codes? Explain Redundancy check in short.

(b) What is data compression? Explain lossy and lossless techniques for data compression with suitable

examples

Q.7 (a) Discuss the features and types of modem. Explain the various encoding schemes briefly.

(b) If the 7bit Hamming code word received by receiver is 1011011. Assuming the even parity, state

whether the received code word is correct or wrong. If wrong code the bit in error:

Q.8 (a) Discuss the features and types of modem. Explain the various encoding schemes briefly.

(b) Explain how parity checking is used for error detection?

Attachment & Scanned Copies:

Share This