Rajiv Gandhi Proudyogiki Vishwavidyalaya 2010-5th Sem B.E Computer Science and Engineering (ester) ,e - university paper

Attempt all 5 ques..All ques. carry equal marks.

1.(a)Explain the basic components of data communication and their characteristics.
(b)Write a brief note on the serial and parallel transmission giving suitable example.

2.(a)Describe the concept of switching and contrast circuit switching and packet switching.
(b)Explain in brief the operation of time division multiplexing.
(c)What signal-to-noise ratio is needed to put a t1 carrier on 50 khz line.

3.(a)Suppose that x bits of user data are to to be transmitted over a k-hop path in a packet switched networks as a series of packets,each containing p data bits and h header bits,with x>p+h. The bit rate for the lines is bbps and propagation delay is negligible.What value of p minimize the total delay?
(b)Explain QAM modulator i brief.
(c)Write a brief note on Nyquist theorem.

4.(a)Describe the function of Null Modem.
(b)What is bridge ?Describe how to LANs subsequent 2 various protocols can be connected using a bridge.

5.(a) What is ISDN? discuss in detail.
define the subsequent components of baseband LANS
(1)Network interface card (11)Repeaters

Earning:   Approval pending.