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CISSP 9.14 - Infrastructure as Code
This episode of the ISC2 Certified Information Systems Security Professional (CISSP) exam prep series explores a shift in how environments are built and maintained. Continuing Domain 3, it considers what changes when hardware configuration stops being a hands-on chore and becomes something written down, tested, and deployed the way software is — and why that shift turns fragile, hand-built setups into infrastructure you can review, repeat, and trust.
What this episode covers
- The mindset shift — from configuring machines one at a time to managing infrastructure like software.
- The DevSecOps home — a development, security, and operations approach that folds security into the pipeline.
- Version control and testing — tracked, reversible changes with pre-deployment and regression checks.
- Consistency at scale — machine-readable definition files roll out settings quickly and identically.
- How far it reaches — the same method governs virtual machines, storage area networks, and software-defined networking.
Watch the full episode above for the worked examples and detailed explanations of each concept.
Frequently Asked Questions
What is infrastructure as code?
Infrastructure as code is a shift in how you think about hardware management. Instead of treating configuration as a manual, hands-on chore done one machine at a time, you treat your infrastructure as just another set of things to manage like software — writing your environment down as a recipe rather than cooking from memory each time.
How does managing hardware like software pay off?
Everything you already do for good code now applies to your infrastructure. You get version control so every change is tracked and reversible, pre-deployment testing, custom checks, and regression testing to catch problems before they ship, and consistency across a whole distributed environment through machine-readable definition files. The result is change that is faster, more reliable, and more secure than hand configuration ever was.
How far does infrastructure as code reach?
Further than physical hardware alone. The same method manages virtual machines, storage area networks, and software-defined networking, so the whole fabric underneath your applications, real or virtual, can be defined, tested, and deployed as code — one consistent blueprint governing servers, storage, and networking alike.
How does infrastructure as code improve security?
It lives under a development, security, and operations approach that folds security into the pipeline. Because settings roll out quickly and identically from tested, machine-readable definitions, environments stay consistent and auditable, and they are far harder to quietly break than fragile, hand-built setups.
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Reference: This article is based on concepts discussed in CISSP 9.14 - Infrastructure as Code.