Air Gap
An air gap is a physical or logical separation from untrusted networks to reduce risk.
Updated: 2026-03-06
Definition
Air-gapped systems are isolated from external networks to reduce exposure to remote attacks.
They are used for highly sensitive environments but still require secure processes (media handling, updates).
Key points
- Isolation reduces remote attack surface
- Still vulnerable via removable media and supply chain
- Requires strict procedures
Common mistakes
- Assuming air gap means 'perfect security'.
- Poor USB/media control reintroducing risk.
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