Cobalt Digital Inc RaQ 4 User Manual page 221

Common gateway interface (CGI)
A set of rules that describe how a Web server communicates with another
application running on the same computer and how the application (called a
CGI program) communicates with the Web server. Any application can be a
CGI program if it handles input and output according to the CGI standard.
Collision
In an ethernet network, a collision is the result of two devices attempting to
transmit data at exactly the same time. The network detects the "collision" of
the two transmitted packets and discards them both. Collisions are a natural
occurrence on an ethernet network.
Ethernet technology uses carrier sense multiple access/collision detect
(CSMA/CD) to allow devices to take turns using the signal carrier line.
When a device wants to transmit, it checks the signal level of the line to
determine whether another device is already using it. If the line is already in
use, the device waits and tries again, perhaps in a few seconds. If the line is
not in use, the device transmits.
However, two devices can transmit at the same time in which case a collision
occurs and both devices detect it. Each device then waits a random amount
of time and retries until successful in getting the transmission sent.
CSMA/CD
See Carrier sense multiple access with collision detection (CSMA/CD).
DHCP
See Dynamic Host Configuration Protocol (DHCP).
Digital Subscriber Line (DSL)
A technology for bringing high-bandwidth information to homes and small
businesses over ordinary copper telephone lines. The term xDSL refers to
different variations of DSL, such as asymmetric DSL (ADSL),
high-bit-rate DSL (HDSL) and rate-adaptive DSL (RADSL). If your home
or small business is close enough to a telephone company central office that
offers DSL service, you may be able to receive data at rates of up to
6.1 Mb/s. More typically, individual connections provide from 512 kb/s to
1.544 Mb/s downstream and about 128 kb/s upstream. A DSL line can carry
both data and voice signals and the data part of the line is continuously
connected.
DNS
See Domain Name System (DNS).
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