Definitions[]
Computer network[]
A domain is
| “ | [a] group of computers and devices on a network that are administered as a unit with common rules and procedures.[1] | ” |
General[]
There are 3 domains: physical domain; virtual domain; and cognitive domain.[2]
Internet[]
A domain is
| “ | [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.[3] | ” |
The term domain refers to a subsection of the Internet. As noted in RFC 920:
| “ | Domains are administrative entities. The purpose and expected use of domains is to divide the name management required of a central administration and assign it to sub-administrations. There are no geographical, topological, or technological constraints on a domain. The hosts in a domain need not have common hardware or software, nor even common protocols. Most of the requirements and limitations on domains are designed to ensure responsible administration. | ” |
The primary domains of the Internet are .com, .net, .mil, and .org, which refer to commercial, network, military, and organization, respectively.
Security[]
A domain is
| “ | 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.[4] | ” |
| “ | [t]he unique context (e.g., access control parameters) in which a
program is operating; in effect, the set of objects that a subject has the ability to access.[5] |
” |
Smart Grid[]
A domain is a high-level grouping of organizations, buildings, individuals, systems, devices or other actors with similar objectives and relying on — or participating in — similar types of applications. Communications among actors in the same domain may have similar characteristics and requirements. Domains may contain sub-domains. The transmission and distribution domains have much overlapping functionality and often share networks and are therefore represented as overlapping domains.
Systems[]
A domain refers to
| “ | [l]ogical groupings of disciplines that form the main building blocks within the architectural framework; a sphere of activity, interest, or function.[6] | ” |
| “ | [h]igh-level logical groupings of functional or topical operations that form the main building blocks within the architectural framework.[7] | ” |
References[]
- ↑ Internet Banking: Comptroller’s Handbook, at 69.
- ↑ DCDC, "United Kingdom Supplement to the NATO Terminology Database," at D-2 (Joint Doctrine Publication 0-01.1 (JDP 0-01.1)) (8th ed. Sept. 2011) (full-text).
- ↑ SANS Glossary of Security Terms.
- ↑ CNSSI 4009.
- ↑ Department of Defense, National Computer Security Center, Glossary of Computer Security Terms (NCSC-TG-004, Ver. 1) (Oct. 21, 1988).
- ↑ California Technology Agency, Enterprise Architecture Glossary 3 (Apr. 2011) (full-text).
- ↑ Id.