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Domain

nounverified·updated May 9, 2026

An environment or context that includes a set of system resources and a set of system entities that have the right to access the resources as defined by a common security policy, security model, or security architecture.

polysemousNISTIR 7298: Glossary of Key Information Security Terms, Revision 2

Senses

SANS Glossary of Security Terms

A sphere of knowledge, or a collection of facts about some program entities or a number of network points or addresses, identified by a name. On the Internet, a domain consists of a set of network addresses. In the Internet's domain name system, a domain is a name with which name server records are associated that describe sub-domains or host. In Windows NT and Windows 2000, a domain is a set of network resources (applications, printers, and so forth) for a group of users. The user need only to log in to the domain to gain access to the resources, which may be located on a number of different servers in the network.

NISTIR 7298: Glossary of Key Information Security Terms, Revision 2

A set of subjects, their information objects, and a common security policy.

Notes on Measurement

specific field of knowledge or expertise

Systems and software engineering —Vocabulary

Distinct scope, within which common characteristics are exhibited, common rules observed, and over which a distribution transparency is preserved.

Engineering Trustworthy Secure Systems

A set of elements, data, resources, and functions that share a commonality in combinations of: (1) roles supported, (2) rules governing their use, and (3) protection needs.

Wordset Dictionary

the content of a particular field of knowledge

Wordset Dictionary

people in general

Wordset Dictionary

(mathematics) the set of values of the independent variable for which a function is defined

Wordset Dictionary

territory over which rule or control is exercised

Wordset Dictionary

a particular environment or walk of life

Classifications

Entity Type

Network82%llm-generatedllm:claude-haiku-4-5
?unassignedlast reviewed

Sensitivity

unclassified

Information Class

unclassified

Variants

synonym
domain of a functionfieldknowledge domainlandworld
plural
Domains
possessive
Domain's
pluralpossessive
Domains'