public:99_annexes:annex-b-terms-and-definitions:e:external_service

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public:99_annexes:annex-b-terms-and-definitions:e:external_service [2026/09/12 17:42] – removed - external edit (Unknown date) 127.0.0.1public:99_annexes:annex-b-terms-and-definitions:e:external_service [2026/09/12 17:43] (current) – ↷ Links adapted because of a move operation nick_dido
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 +====== External Service ======
  
 +[[public:99_annexes:annex-b-terms-and-definitions:start|Go up to Terms and Definitions]]
 +
 +===== Discussion =====
 +
 +An External Service provides functionality used by a system while operating outside the applicable system or authorization boundary.
 +
 +External Services include hosted repositories, identity services, certificate services, time services, vulnerability databases, licensing services, source-control services, and externally operated application programming interfaces.
 +
 +An External Service differs from an [[public:99_annexes:annex-b-terms-and-definitions:e:external_network_connection|External Network Connection]]. The connection provides the communication path. The service provides the functionality reached through that path.
 +
 +Reliance upon an External Service introduces an external dependency. Availability, configuration, identity, authorization, integrity, version, and behavior of the service may affect system operation and the interpretation of test results.
 +
 +===== Definition =====
 +
 +//a service used by a system and provided from outside the applicable system or authorization boundary//
 +
 +===== Source =====
 +
 +Adapted from the National Institute of Standards and Technology (NIST) definition of **external system service**:
 +
 +[[https://csrc.nist.gov/glossary/term/external_information_system_service|NIST Computer Security Resource Center, “external information system service”]]
 +
 +===== Note =====
 +
 +The word **external** identifies the location of the service relative to the applicable boundary. It does not require a particular ownership, commercial relationship, hosting technology, or geographic location.
 +
 +A service operated by the same organization remains an External Service when it operates outside the boundary applicable to the system under consideration.
 +
 +A test record identifies External Services whose availability, state, configuration, output, or behavior affects test execution or interpretation.
 +
 +===== Example =====
 +
 +A DIDO-TE test retrieves a container image from a registry operating outside the Test Environment’s authorization boundary. The container registry constitutes an External Service. The network path used to reach the registry constitutes an External Network Connection.
 +
 +----
 +
 +<WRAP centeralign>
 +© 2026 Dido Solutions, Inc. and Jackrabbit Consulting, Inc.
 +</WRAP>