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11.
What is difference between TCPIIP and UDP?

TCP - Transfer Control Protocol:
Reliable
Connection oriented
Acknowledgement

UDP - User Datagram Protocol: Non reliable
Connectionless
No Acknowledgement

12.
What is NVT (Network Virtual Terminal)?

It is a set of rules defining a very simple virtual terminal interaction. The NVT is used in the start of a Telnet session.

13.
What is SLIP (Serial Line Interface Protocol)?

It is a very simple protocol used for transmission of IP datagrams across a serial line.

14.
What is Kerberos?

It is an authentication service developed at the Massachusetts Institute of Technology. Kerberos uses encryption to prevent intruders from discovering passwords and gaining unauthorized access to files.

15.
What are NETBIOS and NETBEUI?

NETBIOS is a programming interface that allows 1/0 requests to be sent to and received from a remote computer and it hides the networking hardware from applications. NETBEUI is NetBIOS extended user interface. A transport protocol designed by Microsoft and IBM is for the use on small subnets.