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

G-2 Glossary
Active Directory directory service The directory service included in Windows
2000 Server products that identifies all resources on a network and makes them
accessible to users and applications.
Active Directory schema The structure of the tables and fields and how they are
related to one another. In Active Directory, the schema is a collection of data
(object classes) that defines how the real data of the directory (the attributes of an
object) is organized and stored.
Address Resolution Protocol (ARP) Determines hardware addresses (MAC
addresses) that correspond to an Internet Protocol (IP) address.
ad-hoc wireless network A wireless network mode in which multiple wireless stations
can connect without requiring an access point.
administrative share A hidden share that Windows XP Professional creates automatically
so that administrators can access resources on a computer.
ADSL See asymmetric digital subscriber line (ADSL).
Advanced Configuration and Power Interface (ACPI) An open industry specification
that defines power management on a wide range of mobile, desktop, and
server components and peripherals. ACPI is the foundation for the OnNow industry
initiative that allows system manufacturers to deliver computers that will start
at the touch of a keyboard. ACPI design is essential to take full advantage of
power management and Plug and Play in Windows XP Professional. Check the
manufacturer’s documentation to verify that a computer is ACPI-compliant.
Advanced Power Management (APM) A software interface designed by Microsoft
and Intel used between hardware-specific power management software, such as
that located in a system BIOS and an operating system power management driver.
agent A program that performs a background task for a user and reports to the user
when the task is done or when some expected event has taken place.
AGP See Accelerated Graphics Port (AGP).
American National Standards Institute (ANSI) An organization of American
industry and business groups dedicated to the development of trade and communication
standards. ANSI is the American representative to the International Organization
for Standardization (ISO). See also International Organization for
Standardization (ISO).
analog A system that encodes information using frequency modulation in a nonbinary
context. Modems use analog encoding to transmit data through a phone line.
An analog signal can be any frequency, allowing many possibilities. Because of
this ambiguity of signal, a device has to interpret the signal, often finding errors.
See also digital, modem.
analog line A communication line that carries information using frequency modulation.
See also digital line.