X.400 Connector is a type of connector that is available as an optional component of Microsoft Exchange Server.
Category: Letter X
X.121 Address also called an international data number (IDN), is an address of an end node (computer or terminal) that is connected to an X.25 public data network.
X.400 is a set of standards defined in 1984 and 1988 by the International Telecommunication Union (ITU) for computer-based handling of e-mail.
Xerox Network Systems is a suite of networking protocols developed by Xerox Corporation’s Palo Alto Research Center (PARC) in the early 1980s.
X.25 is a packet-switching protocol for wide area network (WAN) connectivity that uses a public data network (PDN) that parallels the voice network of the Public Switched Telephone Network (PSTN).