MU Electronics and Telecom Engineering (Semester 6)
Computer Communication & Telecom Networks
December 2015
Total marks: --
Total time: --
INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary


Solve the following.
1 (a) Compare between pure ALOHA and Slotted ALOHA.
5 M
1 (b) Explain working principle of selective repeat ARQ.
5 M
1 (c) What is the use of subnetwork in IP addressing.
5 M
1 (d) What is bit and byte stuffing explain with example.
5 M

2 (a) Discuss various scheduling methods used in MAC.
10 M
2 (b) Explain need of fragmentation and field related to fragmentation in IP datagram.
10 M

3 (a) Solve the following related of IP datagram:
i) Which field shows number of hop count
ii) If HLEN value is 5 and length of data is 24 bytes. Calculate option.
iii) What are differentiate services?
iv) Packet version of 0.10 is discarded. Justify.
10 M
3 (b) Draw and explain connection establishment using 3 way handshaking in TCP.
10 M

4 (a) What is DSL and HFC? Describe in brief.
10 M
4 (b) What is IEEE 802.11? Explain features of IEEE 802.11. Draw the architecture of IEEE 802.11.
10 M

5 (a) What do you mean by decentralized peer to peer file sharing? How it is different from centralized system.
5 M
5 (b) What are the components of ATM? Explain in brief.
5 M
5 (c) What is the role of ICMP protocol? Explain the error message of ICMP.
5 M

6 (a) An ISP granted a block of addressing starting with 127.60.4.0/20. The ISP wants with each organization receiving 8 address only design subblock and give the slash notation for each subblock.
10 M
6 (b) Which protocol gives mapping of name with IP address? Explain working of such protocol with different records.
10 M



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