User guide

CHAPTER 11: Glossary
152 WatchGuard Firebox System 6.0
MD5 (Message Digest 5)
An improved, more complex version of MD4, but still a 128-bit,
one-way hash function.
message digest
A number that is derived from a message. A change to a single
character in the message will cause it to have a different message
digest.
MIME (Multipurpose Internet Mail Extensions)
Extensions to the SMTP format that allow binary data, such as
that found in graphic files or documents, to be published and read
on the Internet.
modem
A communications device that sends computer transmissions
over a standard telephone line.
motherboard
The main printed circuit board in a computer, which contains
sockets that accept additional boards (daughterboards).
MSDUN
Microsoft Dial-Up Networking is an executable program required
for remote user VPN.
multiple network configuration
A configuration used in situations in which a Firebox is placed
with separate logical networks on its interface.
National Institute for Standards and Technology
A division of the U.S. Department of Commerce that publishes
open interoperability standards called Federal Information
Processing Standards (FIPSs).
network address
The network portion of an IP address. For a class A network, the
network address is the first byte of the IP address. For a class B
network, the network address is the first two bytes of the IP
address. For a class C network, the network address is the first
three bytes of the IP address. In each case, the remainder is the
host address. In the Internet, assigned network addresses are
globally unique.