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Glossary
Glossary
This glossary defines terms and spells out abbreviations you may encounter while
working with online help or the Mac OS X Server Network Services Administration for
Version 10.3 or Later manual. References to terms defined elsewhere in the glossary
appear in italics.
bit A single piece of information, with a value of either 0 or 1.
broadcast The process of transmitting one copy of a stream over the whole network.
byte Eight bits.
DHCP (Dynamic Host Configuration Protocol) A protocol used to distribute IP
addresses to client computers. Each time a client computer starts up, the protocol looks
for a DHCP server and then requests an IP address from the DHCP server it finds. The
DHCP server checks for an available IP address and sends it to the client computer
along with a lease period—the length of time the client computer may use the address.
directory services Services that provide system software and applications with
uniform access to directory domains and other sources of information about users and
resources.
DNS (Domain Name System) A distributed database that maps IP addresses to
domain names. A DNS server, also known as a name server, keeps a list of names and
the IP addresses associated with each name.
DoS (denial of service) attack An Internet attack that uses thousands of network pings
to prevent the legitimate use of a server.
dynamic IP address An IP address that is assigned for a limited period of time or until
the client computer no longer needs the IP address.
filter A “screening” method used to control access to your server. A filter is made up of
an IP address and a subnet mask, and sometimes a port number and access type. The
IP address and the subnet mask together determine the range of IP addresses to which
the filter applies.
LL2351.Book Page 87 Monday, September 8, 2003 2:47 PM