SC-7(29): Separate Subnets to Isolate Functions

CSF v1.1 References:

Threats Addressed:


(Not part of any baseline)

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Control is new to this version of the control set.

Control Statement

Implement [Assignment: physically, logically] separate subnetworks to isolate the following critical system components and functions: [Assignment: organization-defined critical system components and functions].

Supplemental Guidance

Separating critical system components and functions from other noncritical system components and functions through separate subnetworks may be necessary to reduce susceptibility to a catastrophic or debilitating breach or compromise that results in system failure. For example, physically separating the command and control function from the in-flight entertainment function through separate subnetworks in a commercial aircraft provides an increased level of assurance in the trustworthiness of critical system functions.