Browsing: X
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X.121
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ITU-T standard describing an
addressing scheme used in X.25 networks. X.121 addresses are
sometimes called IDNs (International Data Numbers).
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X.21 |
ITU-T standard for serial
communications over synchronous digital lines. The X.21 protocol is
used primarily in Europe and Japan.
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X.21bis |
ITU-T standard that defines the
physical layer protocol for communication between DCE and DTE in an
X.25 network. Virtually equivalent to EIA/TIA-232. See also
EIA/TIA-232
and X.25.
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X.25 |
ITU-T standard that defines how
connections between DTE and DCE are maintained for remote terminal
access and computer communications in PDNs. X.25 specifies LAPB, a
data link layer protocol, and PLP, a network layer protocol. Frame
Relay has to some degree superseded X.25. See also
Frame
Relay,
LAPB,
and PLP.
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X.25 Level 3 |
See
PLP.
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X.25 Protocol |
See
PLP.
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X.28 |
ITU-T recommendation that defines the
terminal-to-PAD interface in X.25 networks. See also
PAD
and X.25.
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X.29 |
ITU-T recommendation that defines the
form for control information in the terminal-to-PAD interface used
in X.25 networks. See also
PAD
and X.25.
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| X.3 |
ITU-T recommendation that defines
various PAD parameters used in X.25 networks. See also
PAD
and X.25.
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| X3T9.5 |
Number assigned to the ANSI Task Group
of Accredited Standards Committee for their internal, working
document describing FDDI.
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| X.400 |
ITU-T recommendation specifying a
standard for electronic mail transfer.
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| X.500 |
ITU-T recommendation specifying a
standard for distributed maintenance of files and directories.
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| X.75 |
ITU-T specification that defines the
signalling system between two PDNs. X.75 is essentially an NNI. See
also NNI.
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| X Display Manager Control Protocol |
See
XDMCP.
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| Xerox Network Systems |
See
XNS.
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| XID |
Exchange identification.
Request and response packets exchanged prior to a session between a
router and a Token Ring host. If the parameters of the serial device
contained in the XID packet do not match the configuration of the
host, the session is dropped.
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| Xid |
See
termid.
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| XDMCP |
X Display Manager Control
Protocol. Protocol used
to communicate between X terminals and workstations running UNIX.
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| XNS |
Xerox Network Systems.
Protocol suite originally designed by PARC. Many PC networking
companies, such as 3Com, Banyan, Novell, and UB Networks used or
currently use a variation of XNS as their primary transport
protocol.
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| XRemote |
Protocol developed specifically to
optimize support for X Windows over a serial communications link.
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| XStream |
Major public PSN in the United States
operated by MCI. Formerly called TYMNET.
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| X terminal |
Terminal that allows a user
simultaneous access to several different applications and resources
in a multivendor environment through implementation of X Windows.
See also X
Windows.
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| X Windows |
Distributed, network-transparent,
device-independent, multitasking windowing and graphics system
originally developed by MIT for communication between X terminals
and UNIX workstations. See also
X
terminal.
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