Gujarat University
MCA Semester V
Networking Technologies- II
Date: January 2003
Time: 3 hrs. Marks:50
Section I
Q-1 a. Explain VoIP Technology. 4
b. Compare TELNET with Rlogin. 3
c. Explain ICMP error messages. 2
OR
Q-1 a. Explain Mobile IP in detail. 5
b. Discuss security aspects to a subnet (different ways to implement security) and role of the Firewalls for implementing network security. 4
Q-2 a. Compare BOOTP with DHCP. Explain DHCP Header. 4
b. Discuss SMTP in detail. 4
OR
Q-2 a. List all the protocols used in TCP/IP reference model (all layers). 2
b. Draw routing table for a subnet of four routers shown below: 4
c. Explain UDP pseudoheader. 2
Q-3 Attempt any four (not more than 2-3 sentences please) 8
1. i. What id minimum MTU size required to send an IP datagram that contains atleast 1 byte of data?
ii. Do you expect a high-speed local area network to have larger or smaller MTU size than a wide area network?
2. i. What is header compression?
ii. Which fields of an IP header change from router to router?
3. Lost TCP acknowledgements do not necessarily force retransmissions. Explain why.
4. Explain DNS SOA records.
5. Explain how sending IP packets to nonexistent addresses on a remote Ethernet can generate broadcast traffic on that network.
Section II
Q-4 a. Explain TCP header. 5
OR
a. Compare IPv4 with Ipv6.
b. Design a network with exactly 1000 clients in a subnet. Write range of IP addresses, Network ID and subnet mask. 3
Q-5 a. Explain FTP and TFTP. List protocols used by both at transport layer. 4
OR
Q-5 a. Discuss implementation of VPN.
b. What is Network Address Translation? Who does NAT in the Network? How? 3
c. Define silence compression and Jitter with respect to VoIP. 1
Q-6 a. Explain Java Network Classes. 5
b. Write a program to connect to a TELNET server on port 7070. Text typed from the client should be displayed on the server. 5
OR
b. Write a program for multiple chat server.
