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Table Of Contents  CertiGuide to Network+
 9  Glossary

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K Kilo

May be either upper or lower case. Mathematically, 210 or 1,204. A kilobyte (KB) is 1,024 bytes. A kilobit (Kb) is 1,024 bits. 8 bits are in 1 byte.

Kerberos authentication protocol

An authentication mechanism used to verify user or host identity. The Kerberos v5 authentication protocol is the default authentication service for Windows 2000. Internet Protocol security and the QoS Admission Control Service use the Kerberos protocol for authentication.

Kernel

The core of layered architecture that manages the most basic operations of the operating system and the computer’s processor for Windows NT and Windows 2000. The kernel schedules different blocks of executing code, called threads, for the processor to keep it as busy as possible and coordinates multiple processors to optimize performance. The kernel also synchronizes activities among Executive-level subcomponents, such as I/O Manager and Process Manager, and handles hardware exceptions and other hardware-dependent functions. The kernel works closely with the hardware abstraction layer.

Key

A secret code or number required to read, modify, or verify secured data. Keys are used in conjunction with algorithms to secure data. Windows 2000 automatically handles key generation. For the registry, a key is an entry in the registry that can contain both subkeys and entries. In the registry structure, keys are analogous to folders, and entries are analogous to files. In the Registry Editor window, a key appears as a file folder in the left pane. In an answer file, keys are character strings that specify parameters from which Setup obtains the needed data for unattended installation of the operating system.

Keyboard filters

Special timing and other devices that compensate for erratic motion tremors, slow response time, and other mobility impairments.

Knowledgebase

Microsoft term for a database related to confirmed issues.


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