Computer Communication & Telecom Networks - May 2015
Electronics & Telecomm. (Semester 6)
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. 1 (a) List the Networking components and map all networking components with OSI layer.(5 marks) 1 (b) What are the components in ATM? Explain it in brief.(5 marks) 1 (c) What do you mean by multiple access? Compare between CSMA/CD & CSMA/CA.(5 marks) 1 (d) What do you mean by decentralized peer file sharing? How it is different from centralized system?(5 marks) 2 (a) identify from IPV4 header
i) Which field gives number of hops count
ii) What is the minimum and maximum length of HLEN
iii) What are the differentiate service explain TOS bits.
iv) which fields are related to fragmentation process.
v) How to calculate total length. Give the functional difference between IPV4 & IPV6.(5 marks) 2 (b) Which protocol send the error message back to the source? Explain the query message of ICMP.(15 marks) 3 (a) Explain the classful addresses of IPV4 with net-id and host-id.(10 marks) 3 (b) An ISP are granted a block of addresses starting with 220.127.116.11./20. The ISP wants to distribute these blocks to 100 organization with each organization receiving & address only. Design sub-blocks and give the slash notation for each sub-block. Find out how many addresses are still available after these allocations.(10 marks) 4 (a) Classify routing protocol? Explain in brief the concept of link state and distance vector algorithms with examples.(10 marks) 4 (b) What is the role of domain name server? Explain working of DNS server with different records.(10 marks) 5 (a) Explain in brief DSL and HFC.(10 marks) 5 (b) Draw and explain the architecture of IEEE 802.11.(10 marks) 6 (a) What do you mean by flow control compare flow control techniques.(10 marks) 6 (b) Explain in detail the different transmission media.(10 marks)