Cochin University of Science and Techology (CUST) 2007 B.Tech Electronics and Communications Engineering computer networks(ember ) - Question Paper

computer networks(november 2007)

1a. with the help of a neat diagram discuss TCP/IP protocol stack.
b. elaborate the advantages of using a layered architecture in computer network design
2a. discuss connection oriented and connection less services given by various layers of ISO/OSI reference model
b. elaborate the various services given by ISDN
c. Write short notes on:
i) ATM ii) FDDI
3a. what is hamming distance? discuss hamming code for fault correction with a suitable example
b. discuss CSMA/CD protocol for multiple access channel
4a. what is the need of ARP protocol? discuss ARP protocol with suitable example. draw ARD header
b. discuss IEEE 802.3 standard in detail
5a. compare datagram and virtual circuit networks
b. discuss distant vector routing with suitable example
c. draw IPV4 datagrams header
6a. discuss OSPF in detail
b. write short notes on :
i) DHCP ii) IGMP
7a. discuss various services given by transport layer
b. draw and discuss TCP segment structure
8a. what is congestion? define various causes of congestion. discuss any 1 of the congestion control algorithms
b. what is the need of flow control? discuss 1 of the flow control methods used by transport layer in TCP/IP state
9a. what is the need of domain name system? discuss the domain name structure followed by World Wide Web
b. discuss any five FTP commands with example
c. how HTTP file transfer differ from FTP file transfer
10a.explain public-key cryptography. how it is utilized in digital signature
b. what is firewall? elaborate the differences ranging from hardware and software firewalls.

Earning:   Approval pending.