What is TELNET?
Telnet is a user command that allows one to access a computer remotely. It is also a TCP/IP protocol, which means that it can be used over the internet (WAN), while also being able to be used over a local network (LAN).
Telnet is a helpful tool as it can allow an administrator or an authorized user to access someone else's computer remotely. This allows them to access the information, make changes, or even troubleshoot conveniently.
Another benefit of Telnet is that over the internet, it can be used via HTTP and FTP protocols to request specific files from remote computers, but without actually having to log on as a user of that computer.