Computer Networks - Dec 2013

Information Technology (Semester 4)

TOTAL MARKS: 80
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Assume data if required.
(4) Figures to the right indicate full marks.

Answer any four :-

1 (a) What are the different categories of the network calssification?(5 marks) 1 (b) Compute the Hamming Code for the data - 1001101(5 marks) 1 (c) State the reasons for having a minimum length requirement for a frame in Ethernet. How is it achived?(5 marks) 1 (d) What are the advantages and disadvantages of hierarchical routing?(5 marks) 1 (e) State the reasons why Network layer and Transport layer are kept as two distinct layer even through their services are so similar.(5 marks) 2 (a) Explain the function of the different Network Hardware Components.(10 marks) 2 (b) Explain sliding window protocol. Draw the sender and receiver window fo a system using Go-Back-N sliding window (size=8) given that-
(i) frame 0 is sent; frame 0 is ACK
(ii) frame 1 and 2 are sent; frame 1 and 2 are ACK
(iii) frame for 3,4,5 are sent; frame 4 is ACK.
(iv) timer for frame 5 expires.
(v) sender resets the window and 4 more frame are sent.(10 marks) 3 (a) Make a comparitive study of Switches Ethernet, Fast Ethernet and Gigabit Ethernet.(10 marks) 3 (b) Draw and explain the architecture and protocol stack of Bluetooth.(10 marks) 4 (a) What are the steps involved in Link state routing. Explain the contents and the requirements of Link state packets.(10 marks) 4 (b) Explain the various methods for congestion control used in datagram subnets.(10 marks) 5 (a) Show the different protocol scenario for establishing a connection using 3-way handshake in the transport layer.(10 marks) 5 (b) Explain the different protocol in the MAC sublayer which uses carrier sensing.(10 marks) 6 (a) Show the usage of the different socket programming primitives used for establishing a connection between client and server.(10 marks) 6 (b) Explain HDLC protocol.(10 marks)

Write notes on (any two ):-

7 (a) Satellite Networks(10 marks) 7 (b) QoS requirements(10 marks) 7 (c) IP header format.(10 marks)