An air gap may be specified in the design documentation, but there may always be deviations from it in practice: additional undocumented changes to the network, undocumented equipment with access to other subnetworks, temporary or auxiliary connections due to repair and other works, and so on. Constant changes are commonplace due to the continuous nature of the production process and the development of network infrastructure. Changes to the network may be occasional (for example, when an operator connects a USB modem). Such events must be detected and the network must be constantly monitored. An air gap does not provide protection against penetration from inside. PT ISIM allows you to build an up-to-date network topology based on real network traffic and ensure constant monitoring for anomalies.
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