-
transit network
-
A transit network passes traffic between networks in addition to
carrying traffic for its own hosts. It must have paths to at
least two other networks.
See also:
backbone
,
stub network
-
Transmission Control Protocol (TCP)
-
An Internet Standard transport layer protocol defined in STD 7,
RFC 793. It is connection-oriented and stream-oriented, as
opposed to UDP.
See also:
connection-oriented
,
stream-oriented
,
User Datagram Protocol
-
Trojan Horse
-
A computer program which carries within itself a means to allow
the creator of the program access to the system using it.
See also:
virus
,
worm
-
TTFN
-
Ta-Ta For Now
-
TTL
-
See:
Time to Live
-
tunnelling
-
Tunnelling refers to encapsulation of protocol A within protocol
B, such that A treats B as though it were a datalink layer.
Tunnelling is used to get data between administrative domains
which use a protocol that is not supported by the internet
connecting those domains.
See also:
Administrative Domain
-
twisted pair
-
A type of cable in which pairs of conductors are twisted together
to produce certain electrical properties.
-
UDP
-
See:
User Datagram Protocol
-
Universal Time Coordinated (UTC)
-
This is Greenwich Mean Time.
[Source: MALAMUD]
-
UNIX-to-UNIX CoPy (UUCP)
-
This was initially a program run under the UNIX operating system
that allowed one UNIX system to send files to another UNIX system
via dial-up phone lines. Today, the term is more commonly used to
describe the large international network which uses the UUCP
protocol to pass news and electronic mail.
See also:
Electronic Mail
,
Usenet
-
urban legend
-
A story, which may have started with a grain of truth, that has
been embroidered and retold until it has passed into the realm of
myth. It is an interesting phenonmenon that these stories get
spread so far, so fast and so often. Urban legends never die,
they just end up on the Internet! Some legends that periodically
make their rounds include "The Infamous Modem Tax," "Craig
Shergold/Brain Tumor/Get Well Cards," and "The $250 Cookie
Recipe".
[Source: LAQUEY]
-
Usenet
-
A collection of thousands of topically named newsgroups, the
computers which run the protocols, and the people who read and
submit Usenet news. Not all Internet hosts subscribe to Usenet
and not all Usenet hosts are on the Internet.
See also:
Network News Transfer Protocol
,
UNIX-to-UNIX CoPy
[Source: NWNET]
-
User Datagram Protocol (UDP)
-
An Internet Standard transport layer protocol defined in STD 6,
RFC 768. It is a connectionless protocol which adds a level of
reliability and multiplexing to IP.
See also:
connectionless
,
Transmission Control Protocol
-
UTC
-
See:
Universal Time Coordinated
-
UUCP
-
See:
UNIX-to-UNIX CoPy
-
virtual circuit
-
A network service which provides connection-oriented service
regardless of the underlying network structure.
See also:
connection-oriented
-
virus
-
A program which replicates itself on computer systems by
incorporating itself into other programs which are shared among
computer systems.
See also:
Trojan Horse
,
worm
-
W3
-
See:
World Wide Web
-
WAIS
-
See:
Wide Area Information Servers
-
WAN
-
See:
Wide area network
-
WG
-
Working Group
-
white pages
-
The Internet supports several databases that contain basic
information about users, such as email addresses, telephone
numbers, and postal addresses. These databases can be searched to
get information about particular individuals. Because they serve
a function akin to the telephone book, these databases are often
referred to as "white pages.
See also:
Knowbot
,
WHOIS
,
X
-
WHOIS
-
An Internet program which allows users to query a database of
people and other Internet entities, such as domains, networks, and
hosts, kept at the DDN NIC. The information for people shows a
person's company name, address, phone number and email address.
See also:
white pages
,
Knowbot
,
X
[Source: FYI4]
-
Wide Area Information Servers (WAIS)
-
A distributed information service which offers simple natural
language input, indexed searching for fast retrieval, and a
"relevance feedback" mechanism which allows the results of initial
searches to influence future searches. Public domain
implementations are available.
See also:
archie
,
Gopher
,
Prospero
-
Wide Area Network (WAN)
-
A network, usually constructed with serial lines, which covers a
large geographic area.
See also:
Local Area Network
,
Metropolitan Area Network
-
World Wide Web (WWW or W3)
-
A hypertext-based, distributed information system created by
researchers at CERN in Switzerland. Users may create, edit or
browse hypertext documents. The clients and servers are freely
available.
-
worm
-
A computer program which replicates itself and is self-
propagating. Worms, as opposed to viruses, are meant to spawn in
network environments. Network worms were first defined by Shoch &
Hupp of Xerox in ACM Communications (March 1982). The Internet
worm of November 1988 is perhaps the most famous; it successfully
propagated itself on over 6,000 systems across the Internet.
See also:
Trojan Horse
,
virus
-
WRT
-
With Respect To
-
WWW
-
See:
World Wide Web
-
WYSIWYG
-
What You See is What You Get
-
X
-
X is the name for TCP/IP based network-oriented window systems.
Network window systems allow a program to use a display on a
different computer. The most widely-implemented window system is
X11 - a component of MIT's Project Athena.
-
X.25
-
A data communications interface specification developed to
describe how data passes into and out of public data
communications networks. The CCITT and ISO approved protocol
suite defines protocol layers 1 through 3.
-
X.400
-
The CCITT and ISO standard for electronic mail. It is widely used
in Europe and Canada.
-
X.500
-
The CCITT and ISO standard for electronic directory services.
See also:
white pages
,
Knowbot
,
WHOIS
-
XDR
-
See:
eXternal Data Representation
-
Xerox Network System (XNS)
-
A network developed by Xerox corporation. Implementations exist
for both 4.3BSD derived systems, as well as the Xerox Star
computers.
-
XNS
-
See:
Xerox Network System
-
Yellow Pages (YP)
-
A service used by UNIX administrators to manage databases
distributed across a network.
-
YP
-
See:
Yellow Pages
-
zone
-
A logical group of network devices (AppleTalk).