CUSAT Computer Networks and Communication Question Paper Nov 2006

CUSAT Computer Networks and Communication Question Paper Nov 2006

 BTS(C) – VII – 06-044 (E)

B. Tech Degree VII Semester Examination November 2006


(2002 Admission Onwards)

Time : 3 Hours                                                                                                                                                                 Maximum Marks: 100

I. (a) What is the need of layering approach in. Computer Network?                          (8) (b) Briefly explain 1SOOS1 layers and their functions,                                          (12)


II. (a) Explain various network topologies,                                                                (10)

(b) Explain the service primitives based on a layer of 1SO-OSI model.                     (10)

II. (a) Differentiate between full duplex and half duplex links.                                 (5)

(b) Write notes on

(i) Terminal handling          (ii) Polling

(iii) Multiplexing and concentration                                                                                                                                                                                          (3×5 = 15)


III. (a) Explain HDLC protocol with its frame format.                                                                                                                                                                                              (8)

(b) Explain sliding window protocol using selective repeat. (12)

V. (a) Explain any one congestion control algorithm. (10)
(b) Discuss any one IEEE standard protocol developed lor LAN topology.OR (10)
Vi. (a)(b) Differentiate between virtual circuits and datagram subnets.Discuss the difference between adaptive and soil-adaptive routing. Explain any one adaptive routing algorithm. (5)(10)
(c) Differentiate between base band and broadband transmission. (5)
VII. (a) Explain the connection establishment and release in TCP. (10)
(b) Explain different functions of session layer.OR (10)
via. (a) What are the similarities and differences between a session and a transport connection? (6)
(b) What is the need of buffering? Explain. (6)
(c) Write notes on client-server model. (8)


EX. (a) Discuss virtual terminal in detail.                                                                         (10)

(b) Explain briefly different data compression techniques.                                           (10)


X. (a) Write short notes on:

(i) FTP             (ii) Electron! e-mail                          (5)

(b) What do you mean by public key cryptography? Explain an algorithm which uses public key cryptography.     (10)

(c) Explain briefly how presentation layer provide Network security.                           (5)

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