Watchguard Firebox X1000, Reference Manual

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CHAPTER 9: Glossary
116 WatchGuard Firebox System
CSLIP (Compressed Serial Line Internet Protocol)
A protocol for exchanging IP packets over a serial line, which
compresses the headers of many TCP/IP packets.
custom filter rules
Filter rules created in WatchGuard Policy Manager to allow
specific content types through the Firebox.
data
Distinct pieces of information, usually formatted in a special way.
data compression
A way of storing data in a format that requires less space than
usual. Data compression is particularly useful in communications
because it enables devices to transmit the same amount of data in
fewer bits.
datagram
A packet of data that stands alone. Generally used in reference to
UDP and ICMP packets when talking about IP protocols.
data transmission speed
The number of bits that are transmitted per second over a network
cable.
DCERPC (Distributed Computing Environment Remote Procedure
Call)
A call that allows connections bound for port 135 on a machine.
These initial calls typically result in a response from the trusted
machine that redirects the client to a new port for the actual
service the client wants.
decompress
To expand a compressed file or group of files so that the file or
files can be opened. See also
compress .
decrypt
To decode data that has been encrypted and turn it back into plain
text.
dedicated server
A computer on a network that is assigned to function only as a
resource server and cannot be used as a client.