Hardware manual

76 Glossary
gateway A network node that interfaces one network to another. Often, it refers to a
computer that links a private LAN to a public WAN, with or without Network Address
Translation. A router is a special kind of gateway that links related network segments.
group A collection of users who have similar needs. Groups simplify the administration
of shared resources.
group folder A directory that organizes documents and applications of special interest
to group members and allows group members to pass information back and forth
among themselves.
guest computer An unknown computer that isn’t included in a computer list on your
server.
guest user A user who can log in to your server without a user name or password.
home directory A folder for a user’s personal use. Mac OS X also uses the home
directory, for example, to store system preferences and managed user settings for
Mac OS X users.
host Another name for a server.
HTML Hypertext Markup Language. The set of symbols or codes inserted in a file to be
displayed on a World Wide Web browser page. The markup tells the web browser how
to display a webpage’s words and images for the user.
HTTP Hypertext Transfer Protocol. The client/server protocol for the World Wide Web.
The HTTP protocol provides a way for a web browser to access a web server and
request hypermedia documents created using HTML.
IANA Internet Assigned Numbers Authority. An organization responsible for allocating
IP addresses, assigning protocol parameters, and managing domain names.
ICMP Internet Control Message Protocol. A message control and error-reporting
protocol used between host servers and gateways. For example, some Internet
software applications use ICMP to send a packet on a round-trip between two hosts to
determine round-trip times and discover problems on the network.
IGMP Internet Group Management Protocol. An Internet protocol used by hosts and
routers to send packets to lists of hosts that want to participate in a process known as
multicasting. QuickTime Streaming Server (QTSS) uses multicast addressing, as does
Service Location Protocol (SLP).
IMAP Internet Message Access Protocol. A client-server mail protocol that allows users
to store their mail on the mail server rather than download it to the local computer.
Mail remains on the server until the user deletes it.