![]() It is easier to control than a direct full network interface, which can be attacked from the exterior insecure system and, if malware infects the secure system, can be used to export secure data. Physical access has to be controlled (man identity and storage media itself). To move data between the outside world and the air-gapped system, it is necessary to write data to a physical medium such as a thumbdrive, and physically move it between computers. This represents a security vulnerability, so air-gapped computers either have their wireless interface controller permanently disabled or physically removed. Many computers, even when they are not plugged into a wired network, have a wireless network interface controller ( WiFi) and are connected to nearby wireless networks to access the Internet and update software. An air-gapped computer or network is one that has no network interfaces, either wired or wireless, connected to outside networks.
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