Network and System Administration 2075

Attempt all the questions. 

1. a) Explain the OSI network layer functionalities and compare it with TCP/IP layer.

b) How do you create and manipulate accounts in Linux? Explain with example.

2. a) What is xinetd? How does it differ from inetd?

b) What is SeLinux? How do you configure firewall in Linux? Explain.

3. a) How does of client machine get IP address via DHCP lease? Explain.

b) Why do we need slave name server? How does primary and slave server communicate with each other?

4. a) What is FQDN? How does DNS delegation work? Explain.

b) Explain NFS operation with its architecture.

5. a) What is proxy? How does HTTP proxy work?

 b) How do you configure HTTP server? Explain the main configuration steps.

6. a) How do you share files between Linux and Windows Machine? Explain

 b) Explain and compare the features with respect to its complexity between postfix and exchange.

7. Write short notes on (any three):

a) SPAM filtering

b) SSH configuration

c) FTP communication

d) Webmin configuration and its features