User guide

166 WatchGuard Firebox X Edge
CIDR (Classless Inter-Domain Routing)
A routing mechanism designed to deal with the exhaustion of Class B network
addresses, and the subsequent allocation of multiple Class C addresses to sites.
CIDR is described in RFC 1519.
cipher block chaining
A form of DES encryption that requires the entire message to decrypt rather
than a portion of the message.
cipher text
The result of manipulating either characters or bits by way of substitution,
transposition, or both.
Class A, Class B, Class C
See
Internet address class .
clear-signed message
A message that is digitally signed but not encrypted.
clear text
Characters in a human readable form prior to or after enryption. Also called
plain text .
client
A computer process that requests a service of another computer and accepts the
server's responses.
Client/Server
A network computing system in which individual computers (clients) use a
central computer (server) for services such as file storage, printing, and
communications. See
peer-to-peer .
coax (coaxial) cable
A type of cable, used in Ethernet networking, with a solid central conductor
surrounded by insulator, in turn surrounded by a cylindrical shield woven from
fine wires.
cold boot
The process of starting a computer by turning on the power to the system unit.
collisions
Conflicts that occur when two packets are sent over the network simultaneously.
Both packets are rejected; Ethernet will automatically resend them at altered
timing.
communications software
Software such as email and faxing software that allows users to send or receive
data.
compress
To compact a file or group of files so that they occupy less disk space. See also
decompress .