Network physically isolated from other networks and the internet for security.
An air-gapped network is physically isolated from other networks and the internet—no cables, no wireless connections. Air-gapping provides strong protection against network-based attacks. Historically, many OT and classified networks were air-gapped. True air-gapping is increasingly rare as connectivity demands grow. Even air-gapped networks face threats—Stuxnet infected air-gapped Iranian nuclear facilities via USB drives. Air-gapping requires strict controls on physical media and devices.
Why It Matters
The DSC Perspective:
Air-gapping provides strong isolation but isn't impenetrable. Don't assume air-gapped systems are automatically secure—they still need security controls and monitoring. USB and other physical vectors bypass air-gaps.