Watchguard Firebox X1000 Reference Manual page 125

Reference Guide
checkbox
A dialog box option that is not mutually exclusive with other
options. Selecting a checkbox inserts or removes an X or a
checkmark; clearing a checkbox removes it.
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.
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