Backbone

A type of MAC environment. A hybrid environment combines the hierarchical and compartmentalized concepts so that each hierarchical level can contain numerous subcompartments that are isolated from the rest of the security domain. A subject must have not only the correct clearance but also the need to know for the specific compartment in order to have access to the compartmentalized object.
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An assigned classification or sensitivity level used in security models to determine the level of security required to protect an object and prevent unauthorized access. Information representing the sensitivity of a subject or object, such as UNCLASSIFIED or its hierarchical classification (CONFIDENTIAL, SECRET, TOP SECRET) together with any applicable nonhierarchical security categories (e. g. , sensitive compartmented information, critical nuclear weapon design information). Piece of information that represents the sensitivity of a subject or object, such as its hierarchical classification (CONFIDENTIAL,
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In a hierarchical database, data is organized like a family tree or organization chart with branches of parent records and child records.
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(1) A hierarchical database that is distributed across the Internet and allows names to be resolved to IP addresses and vice versa to locate services such as Web sites and email. (2) An Internet service that translates domain names into IP addresses.
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A methodology for designing systems and programs through a topdown, hierarchical segmentation.
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