Apple Mac OS X Server Print Service Administration For Version 10.4 or Later Manual do Utilizador descarregar pdf (Página 218)

218 Glossary

computer list A list of computers that have the same preference settings and are

available to the same users and groups.

DHCP Dynamic Host Configuration Protocol. A protocol used to dynamically 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 domain A specialized database that stores authoritative information about

users and network resources; the information is needed by system software and

applications. The database is optimized to handle many requests for information and to

find and retrieve information quickly. Also called a directory node or simply a directory.

directory domain hierarchy A way of organizing local and shared directory domains. A

hierarchy has an inverted tree structure, with a root domain at the top and local

domains at the bottom.

directory node See directory domain.

directory services Services that provide system software and applications with

uniform access to directory domains and other sources of information about users and

resources.

disk image A file that, when opened, creates an icon on a Mac OS desktop that looks

and acts like an actual disk or volume. Using NetBoot, client computers can start up

over the network from a server-based disk image that contains system software. Disk

image files have a filename extension of either .img or .dmg. The two image formats

are similar and are represented with the same icon in the Finder. The .dmg format

cannot be used on computers running Mac OS 9.

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.

drop box A shared folder with privileges that allow other users to write to, but not

read, the folder’s contents. Only the owner has full access. Drop boxes should be

created only using AFP. When a folder is shared using AFP, the ownership of an item

written to the folder is automatically transferred to the owner of the folder, thus giving

the owner of a drop box full access to and control over items put into it.

dynamic IP address An IP address that’s assigned for a limited period of time or until

the client computer no longer needs it.

everyone Any user who can log in to a file server: a registered user or guest, an

anonymous FTP user, or a website visitor.

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Apple Mac OS X Server Print Service Administration For Version 10.4 or Later Manual do Utilizador Página 218