GTU Computer Engineering (Semester 5)
Computer Network
June 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


1 (a) Explain following terms with respect to Computer Network (2) Bluetooth
(3) Routing
(4) Socket
(5) IP Address
(6) VLAN
6 M
1 (b) Draw the OSI reference model. Explain the functionality of each layer in brief.
8 M

2 (a) Explain the role of fiber optics in computer networks. How a fiber optic network is formed?
7 M
2 (b) Explain ALOHA system. How slotted ALOHA works? Differentiate it with pure ALOHA.
7 M
2 (c) What is a Frame? Explain the significance of stuffing. Explain bit stuffing with example.
7 M

3 (a) Describe the working of sliding window protocol. Also explain the piggybacking phenomenon.
7 M
3 (b) Explain shortest path routing with example.
7 M
3 (c) What is MANET? Explain route discovery in AODV protocol with Example.
7 M
3 (d) Explain Distance Vector routing with example.
7 M

4 (a) What is RPC? Draw and explain steps for RPC.
7 M
4 (b) Explain the concept and need of tunnelling with example.
7 M
4 (c) Explain Transmission Control Protocol with TCP header fields.
7 M
4 (d) What is DNS? How resource records are maintained in DNS?
7 M

5 (a) Write a note on HTTP.
7 M
5 (b) Explain connection oriented and connectionless services. Also differentiate both.
7 M
5 (c) List and explain major functionalities provided by E-mail service.
7 M
5 (d) What is CSMA? Explain persistent and nonpersistent CSMA.
7 M



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