Appendix G Glossary
ARP Address Resolution Protocol. A member of the 'Internet
Protocol Suite'. See Appendix C for more information.
ARPA Advanced Research Projects Agency. An American
Academic community involved in research, often for the
Military (DoD).
Baseband Transmission of a signal at its original frequency, without
modulation.
Broadband Use of multiple channels over the same medium using
frequency division of the bandwidth.
CCITT International Consultative Committee on Telegraph and
Telephony (Comité Consultatif Internationale de
Télégraphique et Téléphonique) based in Geneva.
Cheapernet Thinwire Ethernet (IEEE 10BASE2).
CLIP Connection-Less Internet Protocol e.g. IP or CLNP.
CLNP Connection-Less Network Protocol (ISO).
CRC Cyclic Redundancy Check.
CSMA/CD Carrier Sense Multiple Access with Collision Detection. A
method of controlling access to a common bus. Carrier sense
allows stations to detect when the bus is busy, with collision
detection for the occasion when two stations simultaneously
access a free bus.
DDN Defense Data Network. An American Military TCP/IP and
X.25 data network.
DEC Digital Equipment Corporation. A major computer
manufacturer.
DIX DEC, Intel and Xerox; the group of co-operating companies
that developed and standardised Ethernet.
X870-300351 Issue 1 G-1 Rev.0
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