Computer Communication Networks - Jun 2015

Electronics & Communication (Semester 7)

TOTAL MARKS: 100
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any four from the remaining questions.
(3) Assume data wherever required.
(4) Figures to the right indicate full marks. 1 (a) Mention the layers of TCP/IP protocol suite and give brief explanation of protocols used in the suite.(10 marks) 1 (b) Explain usage of existing loops, adaptive technology and discrete multi-tone technique in ADSL.(10 marks) 2 (a) Give design of selective repeat ARQ, and explain its working at sender site and receiver site.(10 marks) 2 (b) Give frame format of HDLC protocol and explain all fields in the frame.(10 marks) 3 (a) Explain working of CSMA/CA with a flow diagram.(10 marks) 3 (b) A pure aloha network transmits 200bit frames on a shared channel of 200 kbps. What is the through put i system produces 1000 frames per second?(4 marks) 3 (c) Explain the idea of CDMA technique.(6 marks) 4 (a) Explain frame format of Ethernet MAC frame.(8 marks) 4 (b) Describe topology, implementation and encoding in fast ethernet.(8 marks) 4 (c) Give summery of standard Ethernet implementations.(4 marks) 5 (a) Describe the three steps involved in finding spanning tree for the following system Fig Q5 (a). (10 marks) 5 (b) Discuss the two most common architectures in backbone networks.(10 marks) 6 (a) Explain classful addressing classes in IPV4.(10 marks) 6 (b) Explain the different fields of IPV₄ datagram.(10 marks) 7 (a) Explain initialization, sharing and updating in distance vector routing protocol.(10 marks) 7 (b) Discuss multicast distance vector routing and its implementation in DVMRP.(10 marks) 8 (a) Explain UDP datagram fornat.(4 marks) 8 (b) Describe three way hand shaking connection establishment and termination in TCP.(8 marks) 8 (c) Mention at least five generic and country domains and explain recursive and iterative resolution.(8 marks)