CertiGuide to Network+  9  Glossary

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Computer Browser service

A service that maintains an up-to-date list of computers and provides the list to applications when requested. The Computer Browser service provides the computer lists displayed in the My Network Places, Select Computer, and Select Domain dialog boxes and (for Windows 2000 Server only) in the Server Manager window.

An object-based programming model designed to promote software interoperability; it allows two or more applications or components to easily cooperate with one another, even if they were written by different vendors, at different times, in different programming languages, or if they are running on different computers running different operating systems. COM is the foundation technology upon which broader technologies can be built. Object linking and embedding (OLE) technology and ActiveX are both built on top of COM.

Manipulating images so they use less storage space. There are two types of compression.

Lossy compression allows for the loss of a few pixels in the compression process. I.E. .JPG

Lossless compression retains all data. I.E. .ZIP

To link or join together characters, files, or images. Sometimes computer manuals refer to the process of concatenating strings, for example the words, never, the, less concatenate has nevertheless.

A basic security function of cryptography. Confidentiality provides assurance that only authorized users can read or use confidential or secret information. Without confidentiality, anyone with network access can use readily available tools to eavesdrop on network traffic and intercept valuable proprietary information. For example, an Internet Protocol security service that ensures a message is disclosed only to intended recipients by encrypting the data.

In DOS and OS/2 platforms, this file extends the ability of the Operating System before completing the boot sequence. For example, DOS was in use long before the CD-ROM. A device driver is called in the Config.sys file to attach CD-ROM (hardware) ability to DOS.

Network operations that do not have a predetermined route, and without the ability to ensure delivery of the data. Examples include: IP (Internet Protocol) and UDP (User Datagram Protocol).

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