--- title: "Day 53: What Is NIST SP 800-171—and Why It’s the Backbone of CMMC" description: CMMC Level 2 is built on NIST SP 800-171. Learn what it covers and why it’s essential for handling CUI. image: https://blog.valeonetworks.com/hubfs/Valeo%20Networks%20Logo%20Blog%20Banner-2.png --- [Skip to the main content.](https://blog.valeonetworks.com/day-53-what-is-nist-sp-800-171-and-why-its-the-backbone-of-cmmc#main-content) [![Valeo-poweredbyForte-white](https://blog.valeonetworks.com/hs-fs/hubfs/Valeo-poweredbyForte-white.png?width=600&height=99&name=Valeo-poweredbyForte-white.png "Valeo-poweredbyForte-white")](https://valeonetworks.com) [![Valeo Networks Division Logos 2024](https://blog.valeonetworks.com/hs-fs/hubfs/VN%20-%20Division%20Logos/Valeo/Valeo%20Networks%20Division%20Logos%202024.png?width=960&height=290&name=Valeo%20Networks%20Division%20Logos%202024.png "Valeo Networks Division Logos 2024")](https://valeonetworks.com) - [Services](https://valeonetworks.com/our-services) - [CMMC Services](https://valeonetworks.com/cmmc-services) - [Managed IT Services](https://valeonetworks.com/our-services/managed-it/) - [Cybersecurity](https://valeonetworks.com/our-services/cybersecurity/) - [Cloud Solutions](https://valeonetworks.com/our-services/cloud-solutions/) - [Compliance](https://valeonetworks.com/our-services/compliance/) - [Industries](https://valeonetworks.com/industries) - [Resources](https://valeonetworks.com/resources) - [Blog](https://blog.valeonetworks.com/) - [Data Sheets](https://valeonetworks.com/resources/datasheets/) - [Ebooks](https://valeonetworks.com/resources/ebooks/) - [Guides & White papers](https://valeonetworks.com/resources/guides-white-papers/) - [In The news](https://valeonetworks.com/in-the-news/) - [Our Services](https://valeonetworks.com/our-services) - [Webinars & Videos](https://valeonetworks.com/resources/webinars-videos/) - [E-Waste](http://valeonetworks.com/resources-e-waste) - [About](https://valeonetworks.com/about) - [Our Story](https://valeonetworks.com/our-story) - [Leadership](https://valeonetworks.com/about/leadership/) - [Partners](https://valeonetworks.com/about/partners/) - [Success Stories](https://valeonetworks.com/success-stories/) - [Contact](https://valeonetworks.com/contact) - [Careers](https://valeonetworks.com/about/careers/) - [Locations](https://valeonetworks.com/contact/locations/) - [Support](https://valeonetworks.com/client-portal/) [888-806-3601](tel:888-806-3601) [Client Portal](https://portal.Valeonetworks.com) Toggle Menu Toggle Menu [888-806-3601](tel:888-806-3601) [Client Portal](https://portal.Valeonetworks.com) - [Services *Toggle Menu*](https://valeonetworks.com/our-services) - [CMMC Services](https://valeonetworks.com/cmmc-services) - [Managed IT Services](https://valeonetworks.com/our-services/managed-it/) - [Cybersecurity](https://valeonetworks.com/our-services/cybersecurity/) - [Cloud Solutions](https://valeonetworks.com/our-services/cloud-solutions/) - [Compliance](https://valeonetworks.com/our-services/compliance/) - [Industries](https://valeonetworks.com/industries) - [Resources *Toggle Menu*](https://valeonetworks.com/resources) - [Blog](https://blog.valeonetworks.com/) - [Data Sheets](https://valeonetworks.com/resources/datasheets/) - [Ebooks](https://valeonetworks.com/resources/ebooks/) - [Guides & White papers](https://valeonetworks.com/resources/guides-white-papers/) - [In The news](https://valeonetworks.com/in-the-news/) - [Our Services](https://valeonetworks.com/our-services) - [Webinars & Videos](https://valeonetworks.com/resources/webinars-videos/) - [E-Waste](http://valeonetworks.com/resources-e-waste) - [About *Toggle Menu*](https://valeonetworks.com/about) - [Our Story](https://valeonetworks.com/our-story) - [Leadership](https://valeonetworks.com/about/leadership/) - [Partners](https://valeonetworks.com/about/partners/) - [Success Stories](https://valeonetworks.com/success-stories/) - [Contact *Toggle Menu*](https://valeonetworks.com/contact) - [Careers](https://valeonetworks.com/about/careers/) - [Locations](https://valeonetworks.com/contact/locations/) - [Support](https://valeonetworks.com/client-portal/) 1 min read # Day 53: What Is NIST SP 800-171—and Why It’s the Backbone of CMMC [Valeo Networks](https://blog.valeonetworks.com/author/valeo-networks) : Sep 18, 2025, 11:15:00 PM [cmmc](https://blog.valeonetworks.com/tag/cmmc) *CMMC Level 2 isn’t built from scratch—it’s built on NIST SP 800-171.*  With 53 days left until the deadline, it’s critical to understand the framework behind the compliance: NIST SP 800-171.  **What Is NIST SP 800-171?**  It’s a cybersecurity standard developed by the National Institute of Standards and Technology (NIST) to protect Controlled Unclassified Information (CUI) in non-federal systems. CMMC Level 2 directly maps to the 110 security practices outlined in this standard.  **Key Domains Covered**  - Access Control  - Awareness & Training  - Incident Response  - Configuration Management  - System & Communications Protection  …and 9 more domains critical to securing sensitive data.  **Why It Matters**  - ✅ It’s the foundation of CMMC Level 2  - ✅ It defines the technical and procedural controls required  - ✅ It’s used by C3PAOs to evaluate compliance readiness  **How Valeo Networks Helps**  We simplify NIST SP 800-171 by:  - Mapping your current controls to the 110 practices  - Identifying gaps and remediation steps  - Implementing missing controls  - Preparing documentation for assessments  ***Don’t just aim for CMMC—master the framework behind it.***  [**Start your NIST 800-171 readiness review**](https://valeonetworks.com/cmmc-services)  📧 Contact: Jim Gast – [jim@valeonetworks.com](mailto:jgast@valeonetworks.com) - [Tweet](https://twitter.com/share) #### ![BusinessOwnerGuidetoM&A-1](https://blog.valeonetworks.com/hs-fs/hubfs/BusinessOwnerGuidetoM%26A-1.png?width=303&height=209&name=BusinessOwnerGuidetoM%26A-1.png) #### Download our eBook*THE ULTIMATE ROADMAP TO CMMC COMPLIANCE* by filling out the form below! [![Day 48: What Is a RP—and Why You Should Work with One](https://blog.valeonetworks.com/hubfs/Valeo%20Networks%20Logo%20Blog%20Banner-Sep-25-2025-01-23-24-8278-PM.png)](https://blog.valeonetworks.com/day-48-what-is-a-rp-and-why-you-should-work-with-one) #### [Day 48: What Is a RP—and Why You Should Work with One](https://blog.valeonetworks.com/day-48-what-is-a-rp-and-why-you-should-work-with-one) [Valeo Networks](https://blog.valeonetworks.com/author/valeo-networks) : Sep 25, 2025, 11:30:00 PM CMMC is complex—Registered Practitioners make it manageable.With 48 days left, working with a Cyber AB Registered Practitioner (RP) ensures your... [cmmc](https://blog.valeonetworks.com/tag/cmmc) [compliance](https://blog.valeonetworks.com/tag/compliance) [Read More](https://blog.valeonetworks.com/day-48-what-is-a-rp-and-why-you-should-work-with-one) [![Day 50: What Is a System Security Plan (SSP)?](https://blog.valeonetworks.com/hubfs/Valeo%20Networks%20Logo%20Blog%20Banner-Sep-23-2025-10-35-04-0879-AM.png)](https://blog.valeonetworks.com/day-50-what-is-a-system-security-plan-ssp) #### [Day 50: What Is a System Security Plan (SSP)?](https://blog.valeonetworks.com/day-50-what-is-a-system-security-plan-ssp) [Valeo Networks](https://blog.valeonetworks.com/author/valeo-networks) : Sep 23, 2025, 11:00:00 PM No SSP? No SPRS submission. No contract.With 50 days left, your System Security Plan (SSP) should be complete, current, and mapped to your CMMC level. [cmmc](https://blog.valeonetworks.com/tag/cmmc) [compliance](https://blog.valeonetworks.com/tag/compliance) [Read More](https://blog.valeonetworks.com/day-50-what-is-a-system-security-plan-ssp) [![Day 46: What Is the Cyber AB—and Why It Governs CMMC](https://blog.valeonetworks.com/hubfs/Valeo%20Networks%20Logo%20Blog%20Banner-Sep-29-2025-01-58-30-1772-PM.png)](https://blog.valeonetworks.com/day-46-what-is-the-cyber-ab-and-why-it-governs-cmmc) #### [Day 46: What Is the Cyber AB—and Why It Governs CMMC](https://blog.valeonetworks.com/day-46-what-is-the-cyber-ab-and-why-it-governs-cmmc) [Valeo Networks](https://blog.valeonetworks.com/author/valeo-networks) : Sep 29, 2025, 10:59:59 PM CMMC isn’t managed by the DoD directly—it’s governed by Cyber AB.With 46 days left, understanding Cyber AB’s role helps you navigate the... 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