External Network

Primary definition

A network not controlled by the organization. Source: NIST SP 800-53 Rev 4

Also known asuntrusted network · public network · non-controlled network · third-party network
2 sources cited4 related termsReviewed Aug 9, 2026
Committee on National Security Systems Glossary CNSSI 4009-2015View source
People also ask

What is external network?

The term External Network refers to a network outside the security boundary, administrative control, or trusted environment of a particular system or organization. It gives election, security, legal, or technical readers a specific label for the concept rather than a broader everyday meaning.

How does external network work in a network?

In practice, External Network is applied to the technical or security purpose captured by its definition: a network outside the security boundary, administrative control, or trusted environment of a particular system or organization. Organizations combine that function with documented procedures, authorized access, testing, monitoring, and controls appropriate to the system. The governing standard or security policy determines the exact implementation.

Why does external network matter for network security?

Understanding External Network matters because the concept can affect security, reliability, auditability, or trusted operation. In this glossary context, it refers to a network outside the security boundary, administrative control, or trusted environment of a particular system or organization. Applying the term precisely helps teams choose controls.

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CNSSGC

A network not controlled by the organization. Source: NIST SP 800-53 Rev 4

Committee on National Security Systems Glossary CNSSI 4009-2015 · 2024

Cite this term

Permanent URL · stable across revisions
Election Security Glossary. (2026). External Network. In Election Security Glossary. Retrieved August 22, 2026, from https://electionsecurityglossary.com/glossary/external-network

Sources

2 cited · last checked Aug 9, 2026

01

Committee on National Security Systems Glossary CNSSI 4009-2015
Committee on National Security Systems Glossary CNSSI 4009-2015

High consensus

View source

02

The Cyber Glossary
The Cyber Glossary

Multi-source

View source

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