3Com 520 - Manual (Page 83)

C-3
CHAP Challenge Handshake Authentication
Protocol. Part of the PPP protocol to ensure
authentication of the connection between two
devices.
Class Type of IP address. IP addresses fall into three
main classes, A, B and C.
Client A user whom is making use of a particular
system resource or peripheral through a workstation
attached to a local or wide area network.
Client/server A user who is attached to a file server
to recover and store files, but the processing of the
data or use of an application is carried out on the
client machine.
Coaxial cable A twin-conductor cable used for
computer networking, in either a thick or thin form.
This cable consists of a centre core wire (stranded or
single core) covered by insulation, a second
conductor of woven wire, and an external covering
of rubber. Thin coaxial cable resembles television
cable. Thick coaxial cable has an increased diameter
outer bore and is often yellow or orange in color.
CSMA/CD Carrier Sense Multiple Access with
Collision Detection, the Ethernet protocol that
allows each device to create and send its own data
packets. CSMA/CD is used to avoid excessive
collisions between packets as they are randomly
transmitted. A CSMA/CD device first listens for other
carriers, if it detects no other carriers, it will then
allow the data packet to be transmitted. If a collision
is detected, the device stops transmitting, waits a
random length of time, and begins transmitting
again.
D Channel A control channel carrying signalling
information, running at 16 Kbps. The basic rate ISDN
2 service carries two B channels plus one control D
channel. Refer to ISDN and B Channel .
Data Characters or code either entered by the user
or passed between devices that are part of the
computer or network.
Data communications The transfer of data via
transceiver equipment by means of data
transmission according to a protocol. Refer to
Protocol .
Rc.bk : GLOSSARY.FRM Page 3 Thursday, July 10, 1997 9:53 AM