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NIST 800-171 · System and Communications Protection

Requirement 3.13.5

SPRS weight
SPRS weight: 5
POA&M eligibility
Not POA&M-eligible
Assessment objectives
2 assessment objectives

Official requirement text

Implement subnetworks for publicly accessible system components that are physically or logically separated from internal networks.

Assessment objectives

Assessors don’t evaluate the requirement as one sentence; they walk these objectives one by one. Each must be met for the requirement to score.

  1. 3.13.5[a]publicly accessible system components are identified.
  2. 3.13.5[b]subnetworks for publicly accessible system components are physically or logically separated from internal networks.

Inside Valontir, this requirement carries a full plain-English guide: what it asks in normal words, what good looks like in a small shop, the evidence an assessor accepts, the common gaps that cost points, and a plain reading of every assessment objective shown above. See it in a demo.

NIST 800-171 3.13.5 explained — System and Communications Protection | Valontir