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SynAc
Term

cross-domain solution

Synonym for "guard".

Senses

1 (D)

Synonym for "guard".

Deprecated Term: IDOCs SHOULD NOT use this term as a synonym for "guard"; this term unnecessarily (and verbosely) duplicates the meaning of the long-established "guard".

References
  • IETF RFC 4949 (Internet Security Glossary)Jan 06, 2026
    RFC 4949 — Internet Security Glossary (Version 2)
    https://www.rfc-editor.org/rfc/rfc4949.txt
    RFC 4949 is published by the IETF Trust and marked as "Distribution of this memo is unlimited". Verify IETF Trust copyright/licensing terms for reuse.
    Source: IETF RFC 4949 (rfc-editor.org).
2 (O) /U.S. Government/

A process or subsystem that provides a capability (which could be either manual or automated) to access two or more differing security domains in a system, or to transfer information between such domains. (See: domain, guard.)

References
  • IETF RFC 4949 (Internet Security Glossary)Jan 06, 2026
    RFC 4949 — Internet Security Glossary (Version 2)
    https://www.rfc-editor.org/rfc/rfc4949.txt
    RFC 4949 is published by the IETF Trust and marked as "Distribution of this memo is unlimited". Verify IETF Trust copyright/licensing terms for reuse.
    Source: IETF RFC 4949 (rfc-editor.org).