| X SERIES |
A collection
of widely accepted standards, including data communications. |
| X WINDOWS |
A software
protocol developed at MIT for a distributed windowing system. X uses TCP
for a transport protocol. |
| X-MODEM |
A communication
protocol that lets you transfer files over a serial line. See also Y-modem
and Z-modem. |
| X.400 |
A protocol
defining standards for electronic mail in an open network. |
| X.500 |
A protocol
defining standards for directory services in an open network. |
| XNS |
(Xerox
Networking Standard) Networking protocols developed by Xerox, similar to
TCP/IP. |