The terminal offers a wide range of additional commnunication methods like rlogin, named pipes, unix sockets and supports emulations like xterm, VT220, TN3270, Wyse and many more.
Secure Shell is a cryptographic protocol that securely transports data over an unsecured network. As the name suggests, its main purpose is to establish a secure connection to a remote shell account.
ZOC Terminal is the software, which the user runs on his local computer to connect to the remote server. Once connected, it enables the user to enter commands and perform tasks through the shell of the remote computer.