Explain following: I. Telnet II. FTP

Explain following: I. Telnet II. FTP 
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1 Answer

Answer :

1. Telnet:

TELNET is abbreviation for Terminal Network. It is standard TCP/IP protocol for virtual terminal services proposed by ISO.

TELNET enables establishment of connection to a remote system in such a way that a local terminal appears to be terminal at remote system.

TELNET is general purpose client server application program.

2. FTP.

FTP is a stranded mechanism provided by the Internet for copying a file from one host to the other. 

Some of the problem in transferring files from one system to the other are as follows:

 Two systems may use different file name conventions.

 Two systems may represent text data in different types.

 The directory structure of the two systems may be different.

FTP provides a simple solution to all these problems.

FTP established two connections between the client and server. One is for data transfer and the other is for the control information.

The fact that FTP separates control and data makes it very efficient.

The control connection uses simple rules of communication. Only one line of command or a line of response is transferred at a time.

But the data connection uses more complex rules due to the variety of data types being transferred.

FTP uses port 21 for the control connection and port 20 for the data connection. 
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