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Appendix B
-----T-----
T1 link Digital transmission link capable of speeds up to 1544 kilobits per
second.
TA Terminal adaptor. Device that connects a network or terminal to an
ISDN network.
telnet IP protocol that lets a user on one host establish and use a virtual ter-
minal connection to a remote host.
twisted pair Cable consisting of two copper strands twisted around each other. The
twisting provides protection against electromagnetic interference.
-----U-----
UTP Unshielded twisted pair cable.
-----V-----
VJ Van Jacobson. Abbreviation for a compression standard documented
in RFC 1144.
-----W-----
WAN Wide Area Network. Private network facilities, usually offered by public
telephone companies but increasingly available from alternative
access providers (sometimes called Competitive Access Providers, or
CAPs), that link business network nodes.
WWW World Wide Web.
-----X-----
xon/xoff Special characters used for software flow control to regulate commu-
nication between a device and a modem.