Xerox 480 ST, 490 ST manual CSMA/CD Carrier, Access/Collision, To its origin

CSMA/CD (Carrier	Network access method in which nodes contend for the right to send
Sense Multiple	data. If two or more nodes attempt to transmit at the same time, they
Access/Collision	abort their transmission until a random time period of microseconds
Detection)	has transpired and then attempt to re-send.
DB-9	A standardized connector with 9 pins for Token Ring and serial
	connections.
DNS (Domain Name	A TCP/IP protocol for discovering and maintaining network
Service)	resource information distributed among different servers.
DOS (Disk	The operating system developed by Microsoft and often ported by
Operating System)	computer manufacturers such as IBM to run specifically on their
	computers.
EMI/RFI	A form of “noise” on data transmission mediums that can reduce
(Electromagnetic	data integrity and increase transmission errors.
Interface/Radio
Frequency)
Ethernet	A 10 megabits per second baseband, CSMA/CD network originally
	designed by Xerox Corporation.
EtherTalk	AppleTalk protocol governing Ethernet transmissions. Also the
	Apple Computer Ethernet adapter and drivers. The first
	implementation, Phase 1, was replaced by Phase 2 in 1989.
FTP (File Transfer	A TCP/IP application protocol governing file transfer.
Protocol)
GUI (Graphical User	Icon oriented style of screen display designed by Xerox and the
Interface)	PARC project.
Half Duplex	Method of communication where each character sent is echoed back
	to its origin.
IEEE (Institute of	A professional organization within the ISO that assists with the
Electrical and	creation of networking standards.
Electronics
Engineers)
Internet	Connected networks including those of the National Science
	Foundation the Advanced Projects Research Agency.

Glossary

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