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AC-04(21) Physical or Logical Separation of Information Flows

NIST SP 800-53 (controls) 5.2.0 against 5.2.0
All changes in this version
unchanged AC part of AC-4

Title

Physical or Logical Separation of Information Flows

Control

Separate information flows logically or physically using [Assignment: organization-defined mechanisms and/or techniques] to accomplish [Assignment: required separations].

Discussion

Enforcing the separation of information flows associated with defined types of data can enhance protection by ensuring that information is not commingled while in transit and by enabling flow control by transmission paths that are not otherwise achievable. Types of separable information include inbound and outbound communications traffic, service requests and responses, and information of differing security impact or classification levels.

Parameters

ac-4.21_prm_1: organization-defined mechanisms and/or techniques
ac-04.21_odp.01: mechanisms and/or techniques
ac-04.21_odp.02: mechanisms and/or techniques
ac-04.21_odp.03: required separations

Related controls

sc-32

STIG rules that implement this control 0

No followed STIG rule cites a CCI indexed to this control (CCI list 2026-07-14).