gloss_U

U

User Datagram Protocol (UDP).

A TCP/IP protocol that, unlike TCP, does not establish a formal session between two communicating computers in order to guarantee the delivery of data.

Unattended installation.

The process of installing Windows XP using an answer file and a UDF file.

Uniqueness Database File (UDF).

A file that provides computer-specific settings during an unattended installation.

Universal Naming Convention (UNC) reference.

A command syntax that provides the ability to specify network resources in the format of \\ComputerName\ ResourceName.

Universal Plug and Play (UPnP).

A service that allows a computer to automatically detect and connect to network devices that are UPnP compatible.

Upgrade.

An Windows XP installation option where an existing operating system and its application and custom settings are migrated to Windows XP during installation.

Upgrade Advisor.

A utility that administrators can use to scan a computer and create a hardware and software incompatibility report to identify compatibility issues that may exist on the computer.

User environment variables.

Variables created and managed by Windows XP that affect the individual users of the computer. Changes made to system variables do not go into effect until the user logs off and back on.

User mode.

An operational mode that allows the execution of snap-ins and extensions loaded into a Microsoft Management Console.

User State Migration Tool (USMT).

A utility that assists administrators in migrating settings for a large number of computers.

Users.

A Windows XP group whose members are permitted to log in, run applications, save and print files, turn off the computer, and perform other nonadministrative tasks.