Need help... Differences in Communication commands

What is the difference between the following commands. Please with example?
rsh
ssh
scp
rcp
rlogin
ftp
telnet

Cheers..

You mean beyond the different purposes, protocols used, encryption, invocation, output, return codes, and their description in the man pages?

i do not want it in full detail... but with basic example for those commands....

try them out and see what happens! the man pages give examples of what they are but it depends on the OS too, on ubuntu (ie linux) man of rsh and ssh is the page for ssh and the same is true of rcp and scp -

rsh/ssh - remote/secure shell (ie login)
rcp/scp - remote/secure copy
telnet - remote connect, good to see if a port is open
ftp - file transfer

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