MCSA/MCSE Self-Paced Training Kit (Exam 70-270): Installing ...

G-46 Glossary
U
UDF See uniqueness database file (UDF).
UDP See User Datagram Protocol (UDP).
unattended installation An automated installation in which the Winnt32 and Winnt
commands are used along with an unattended answer file to script the installation.
UNC See Universal Naming Convention (UNC).
Uniform Resource Locator (URL) Provides the hypertext links between documents
on the World Wide Web (WWW). Every resource on the Internet has its own URL
that specifies the server to access as well as the access method and the location.
URLs can use various protocols including File Transfer Protocol (FTP) and Hypertext
Transfer Protocol (HTTP).
uninterruptible power supply (UPS) A device connected between a computer or
another piece of electronic equipment and a power source, such as an electrical
outlet. The UPS ensures that the electrical flow to the computer is not interrupted
because of a blackout and, in most cases, protects the computer against potentially
damaging events such as power surges and brownouts. All UPS units are
equipped with a battery and loss-of-power sensor. If the sensor detects a loss of
power, it immediately switches to the battery so that users have time to save their
work and shut off their computers. Most higher-end models have features such as
power filtering, sophisticated surge protection, and a serial port so that an operating
system capable of communicating with a UPS (such as Windows XP Professional)
can work with the UPS to facilitate automatic system shutdown.
uniqueness database file (UDF) A text file that is used in conjunction with an
answer file and contains the settings that are unique to each computer.
Universal Naming Convention (UNC) A convention for naming files and other
resources beginning with two backslashes (\\), indicating that the resource exists
on a network computer. UNC names conform to the \\Servername\Sharename
syntax.
universal serial bus (USB) A serial bus with a data transfer rate of 12 megabits per
second (Mbps) for connecting peripherals to a microcomputer. USB can connect
up to 127 peripheral devices to the system through a single general-purpose port.
This is accomplished by daisy chaining peripherals together. USB is designed to
support the ability to automatically add and configure new devices as well as the
ability to add such devices without having to shut down and restart the system.
UPN See user principal name (UPN).
UPS See uninterruptible power supply (UPS).
URL See Uniform Resource Locator (URL).