Cochin University of Science and Techology (CUST) 2008 B.Tech Electronics and Communications Engineering Computer Communication and Networking - Question Paper

I.

(a)

Explain the different network topologies.

(10)

II.

(b)

Explain the concept of internet and internet services.

OR

With the help of a diagram explain each and every function performed by each layer

(10)

in OS! reference model.

(20)

III.

(a)

Differentiate between base band and broad band transmission.

(5)

(b)

Explain full duplex and half-duplex links.

(5)

(c)

What are the functions of MODEM? Explain the working of one MODEM in detail.

OR

(10)

IV.

(a)

Explain stop and wait sliding window protocol.

(10)

(b)

Explain X - 21 digital interface.

(10)

V.

(a)

Explain the difference between virtual circuits and datagram.

(8)

(b)

Explain any two congestion control algorithm.

OR

(12)

VI.

(a)

Explain CSMA/CD.

(8)

(b)

Explain the different IEEE 802 standards.

(12)

VII.

(a)

Explain client-server model.

(10)

(b)

Explain multiplexing and crash recovery

OR

(10)

VIII.

(a)

Explain flow control and buffering.

(10)

(b)

With the help of a diagram explain the implementation of RPC.

(10)

IX.

(a)

Explain the different data compression techniques.

(10)

X.

(b)

Explain the functions of presentation layer.

OR

Write short notes on :

(i) Virtual terminal (ii) FTP

(iii) Electronic mail (iv) Distributed system

(v) Cryptography.

(10)

(20)