Standard or regulation
air gap - Glossary, Computer Security Resource Center
NIST Computer Security Resource Center, 2022
Read the originalRead on October 17, 2026
- What it is
- The NIST glossary entry for air gap. It defines the term as an interface between two systems that are not physically connected and whose logical connection is not automated, and it credits the wording to CNSSI 4009-2022, which reuses IETF RFC 4949.
- How much weight it carries
- Official US government glossary entry, read on 2026-10-17. It defines the term for the data path between two systems. It does not say how a given organization must isolate its networks.
Facts taken from this source
- NIST's glossary defines an air gap as an interface between two systems that are not physically connected and whose logical connection is not automated.
“An interface between two systems at which (a) they are not connected physically and (b) any logical connection is not automated” (Definitions)