Computer Communication Networks - Jun 2014

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) Describe the layer presentation in the TCP/IP model and explain the protocol of each layer.(8 marks) 1 (b) What is ADSL? Explain the operation of ADSL using discrete multi one tone modulation with a neat diagram.(8 marks) 1 (c) List diagram types of addressing. Explain any one type of addressing with suitable examples.(4 marks) 2 (a) What is framing? Explain bit stuffing with a help of a diagram.(5 marks) 2 (b) With neat diagram, explain HDLC frame format.(5 marks) 2 (c) Explain stop and wait automatic repeat request for noisy channel.(8 marks) 2 (d) Perform bit stuffing on the given bit stream
000111111100111110100 assume flag as 01111110.(2 marks) 3 (a) A pure ALOHA network transmits 200 bit frames on a shared channel of 200kbps. What is the throughput if system produces: i) 1000 frames per second: ii) 500 frames per second.(4 marks) 3 (b) Explain 1-persistent, non-persistent and p-persistent with flow diagram.(6 marks) 3 (c) With suitable diagram and example CDMA.(6 marks) 3 (d) Explain polling as a controlled access technique.(4 marks) 4 (a) Explain frame format of 802.3 MAC frame.(6 marks) 4 (b) Define the type of the following destination address and justify answer:
i) 4A:30:10:21:10:1A
ii)47:20:1B:2E:08:EE(4 marks) 4 (c) Explain bridge Ethernet, switched Ethernet, full duplex Ethernet.(10 marks) 5 (a) Explain what is loop problem and solution for a loop problem in a bridge with suitable examples and diagams.(10 marks) 5 (b) Explain bus backbone and star backbone networks.(6 marks) 5 (c) What is VLAN? Explain briefly?(4 marks) 6 (a) What is NAT? Explain how NAT help in address depletion.(5 marks) 6 (b) Explain IPV4 datagram.(5 marks) 6 (c) An ISP granted a block of addressing with 190.100.0.0/16. The ISP needs to distributed these address to three groups of customer as follows:
i) First group has 64- customer each with 256 addresses.
ii) Second group has 128 customer each with 128 addresses.(5 marks) 6 (d) Explain class full addressing for IP address.(5 marks) 7 (a) With suitable diagram explain distance vector routing.(10 marks) 7 (b) Explain different solution to two-node instability.(5 marks) 7 (c) Explain source-based tree and group shared based tree.(5 marks) 8 (a) Describe a TCP connection establishment using three way handshake.(10 marks) 8 (b) Explain TCP and UDP datagram.(10 marks)