What is the difference between Telnet and SSH?

ssh is a secured shell, where telnet is not a secured
one.when you ssh to trasnfer data between a system, the data
will be send in the encrypted form, where the hacker cannot
encode or decode it. While you telnet,the data send between
the system is alphabetical format(ASCII), where every one
can understand. More over as per network security, telnet
and ftp are prohibited. Always, trust SSL based data transfer.

Telnet ->
Its just getting (Telenet) a connection to the server.
Its not more secure. Anybody can use it.
It can be easly hacked.It can be easily read by anybody in
that network

SSH -> secured shocket shell
Its more secure than Telnet .
This has an encrption and decrption of the data /usr/pwd
None can hack this. It is the good way to transfer the data