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An air gapped network (right) with no connection to a nearby internet-connected network (left) An air gap, air wall, air gapping [1] or disconnected network is a network security measure employed on one or more computers to ensure that a secure computer network is physically isolated from unsecured networks, such as the public Internet or an unsecured local area network. [2]
Air-gap malware is malware that is designed to defeat the air-gap isolation of secure computer systems using various air-gap covert channels. [ 1 ] [ 2 ] Operation
Air gap (networking), physical isolation from external computer networks; IBM airgap, a technique invented by IBM for fabricating vacuum pockets in integrated circuits; Air gap (magnetic), a gap in the magnetic material Air gap, used in inductors and transformers; Air gap in an electric machine, a space between the rotor and the stator in the ...
A unidirectional network (also referred to as a unidirectional gateway or data diode) is a network appliance or device that allows data to travel in only one direction. Data diodes can be found most commonly in high security environments, such as defense, where they serve as connections between two or more networks of differing security ...
"Air gap" isolation or "parallel network" [ edit ] As a last resort, computers can be protected from malware, and the risk of infected computers disseminating trusted information can be greatly reduced by imposing an "air gap" (i.e. completely disconnecting them from all other networks) and applying enhanced controls over the entry and exit of ...
I read: In Internet Protocol networking, an air gap specifically refers to a physical separation of two devices or networks. It is most recognizable in the time-honored configuration known as "sneaker-net" where the only connection between two devices or networks is via a human being providing media-switching, i.e.; floppies, CDs, USB drives, or connection/disconnection of network connections.
It is typically introduced to the target environment via an infected USB flash drive, thus crossing any air gap. The worm then propagates across the network, scanning for Siemens Step7 software on computers controlling a PLC. In the absence of either criterion, Stuxnet becomes dormant inside the computer.
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