Cayman Systems 2E-W, User Manual

Page: 155 / 170

Cayman 2E-W User’s Guide Glossary
November 2000
1
Glossary
10Base2 IEEE 802.3 specification for Ethernet that uses thin coaxial cable to
run at 10 Mbps. Limited to 185 meters per segment. 10Base5 IEEE
802.3 baseband physical layer specification for Ethernet that uses
thick coaxial cable to run at 10 Mbps. Limited to 500 meters per
segment.
10Base-T IEEE 802.3 specification for Ethernet that uses unshielded twisted
pair (UTP) wiring with RJ-45 eight-conductor plugs at each end.
Runs at 10 Mbps.
ACK
Acknowledgment. Message sent from one network device to
another to indicate that some event has occurred. See NAK.
access rate
Transmission speed, in bits per second, of the circuit between the
end user and the network.
adapter
Board installed in a computer system to provide network
communication capability to and from that computer system.
address mask
See subnet mask.
ADSL
Asymmetric Digital Subscriber Line. Modems attached to twisted
pair copper wiring that transmit 1.5-9 Mbps downstream (to the
subscriber) and 16 -640 kbps upstream, depending on line distance.
ANSI
American National Standards Institute.
ASCII
American Standard Code for Information Interchange (pronounced
ASK-ee). Code in which numbers from 0 to 255 represent individual
characters, such as letters, numbers, and punctuation marks; used
in text representation and communication protocols.