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Table Of Contents  CertiGuide to Network+
 9  Glossary

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Graphical user interface (GUI)

A display format, like that of Windows, which represents a program’s functions with graphic images such as buttons and icons. GUIs allow a user to perform operations and make choices by pointing and clicking with a mouse.

Ground

An electrical circuit, common ground return path, which is required to complete the circuit.

Group

A collection of users, computers, contacts, and other groups. Groups can be used as security or as e-mail distribution collections. Distribution groups are used only for e-mail. Security groups are used both to grant access to resources and as e-mail distribution lists. In a server cluster, a group is a collection of resources, and the basic unit of fail over.

Group Identification (GID)

A group identifier that uniquely identifies a group of users. UNIX uses the GID to identify the group ownership of a file, and to determine access permissions.

Group memberships

The groups to which a user account belongs. Permissions and rights granted to a group are also provided to its members. The actions a user can perform in Windows 2000 are determined by the group memberships of the user account to which the user is logged on.

Group Policy

An administrator’s tool for defining and controlling how programs, network resources, and the operating system operate for users and computers in an organization. In an Active Directory environment, Group Policy is applied to users or computers on the basis of their membership in sites, domains, or organizational units.

Group Policy object

A collection of Group Policy settings. Group Policy objects are the documents created by the Group Policy snap-in. Group Policy objects are stored at the domain level, and they affect users and computers contained in sites, domains, and organizational units. Each Windows 2000-based computer has exactly one group of settings stored locally, called the local Group Policy object.

Guard Band

Utilized in both radio frequency transmissions and telecommunications the guard band is a new frequency used to separate channels above and below the channel carrying data. The purpose is to prevent interference.

GUI

Graphical User Interface. A point and click interface, relying on graphical icons. Gnome, Macintosh and Windows are examples of GUI interfaces.


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