Specifications

312 Glossary
log in (verb) To start a session with a computer (often by authenticating as a user with
an account on the computer) in order to obtain services or access files. Note that
logging in is separate from connecting, which merely entails establishing a physical link
with the computer.
logical disk A storage device that appears to a user as a single disk for storing files,
even though it might actually consist of more than one physical disk drive. An Xsan
volume, for example, is a logical disk that behaves like a single disk even though it
consists of multiple storage pools that are, in turn, made up of multiple LUNs, each of
which contains multiple disk drives. See also physical disk.
LPR Line Printer Remote. A standard protocol for printing over TCP/IP.
MAC address Media access control address. A hardware address that uniquely
identifies each node on a network. For AirPort devices, the MAC address is called the
AirPort ID.
mail host The computer that provides your mail service.
managed client A user, group, or computer whose access privileges and/or
preferences are under administrative control.
managed network The items managed clients are allowed to see when they click the
Network icon in a Finder window. Administrators control this setting using Workgroup
Manager. Also called a network view.
managed preferences System or application preferences that are under administrative
control. Workgroup Manager allows administrators to control settings for certain
system preferences for Mac OS X managed clients.
MIME Multipurpose Internet Mail Extensions. An Internet standard for specifying how a
web browser handles a file with certain characteristics. A file’s suffix describes its type.
You determine how the server responds when it receives files with certain suffixes.
Each suffix and its associated response make up a MIME type mapping.
MX record Mail exchange record. An entry in a DNS table that specifies which
computer manages mail for an Internet domain. When a mail server has mail to deliver
to an Internet domain, the mail server requests the MX record for the domain. The
server sends the mail to the computer specified in the MX record.
MySQL An open source relational database management tool frequently used by web
servers.
name server A server on a network that keeps a list of names and the IP addresses
associated with each name. See also DNS, WINS.