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262 Glossary
multicast DNS A protocol developed by Apple for automatic discovery of computers,
devices, and services on IP networks. Called Bonjour (previously Rendezvous) by Apple,
this proposed Internet standard protocol is sometimes referred to as ZeroConf or
multicast DNS. For more information, visit www.apple.com or www.zeroconf.org. To see
how this protocol is used in Mac OS X Server, see local hostname.
name server A server on a network that keeps a list of names and the IP addresses
associated with each name. See also DNS.
NetBIOS Network Basic Input/Output System. A program that allows applications on
different computers to communicate within a local area network.
NetBoot server A Mac OS X server you’ve installed NetBoot software on and have
configured to allow clients to start up from disk images on the server.
NetInfo An older Apple protocol for accessing a directory domain.
NFS Network File System. A client/server protocol that uses Internet Protocol (IP) to
allow remote users to access files as though they were local. NFS can export shared
volumes to computers based on IP address, and also supports single sign-on (SSO)
authentication through Kerberos.
NTP Network Time Protocol. A network protocol used to synchronize the clocks of
computers across a network to some time reference clock. NTP is used to ensure that
all the computers on a network are reporting the same time.
Open Directory The Apple directory services architecture, which can access
authoritative information about users and network resources from directory domains
that use LDAP, Active Directory protocols, or BSD configuration files, and network
services.
Open Directory master A server that provides LDAP directory service, Kerberos
authentication service, and Open Directory Password Server.
owner The owner of an item can change access permissions to the item. The owner
may also change the group entry to any group the owner is a member of. By default,
the owner has Read & Write permissions.
parent A computer whose shared directory domain provides configuration
information to another computer.
password An alphanumeric string used to authenticate the identity of a user or to
authorize access to files or services.
PDC Primary domain controller. In Windows networking, a domain controller that has
been designated as the primary authentication server for its domain.
physical disk An actual, mechanical disk. Compare with logical disk.