TELNET

Description
TELNET is a Virtual Terminal protocol used by 3270 emulation software. TELNET is defined by RFC 854.

Various attributes of terminal emulation and the session with the host are done via TELNET option negotiation.

3270 emulation over TELNET uses one of two methods:

TN3270
This a set of conventions codified in RFC 1576. It has fairly limited capabilities.

TN3270E
This is an explicit option added to TELNET, defined in RFC 2355. It is much more flexible than TN3270.