CRISC Risk Response and Reporting Practice Question
An organization is implementing a new access control system. Which of the following is the MOST important consideration during the implementation phase?
⚠ Common exam trap
Watch out — candidates often confuse 'most important during implementation' with 'most important overall,' leading them to select user training or documentation, but CRISC emphasizes that uncontrolled changes introduce the highest risk of failure and security incidents during the deployment phase.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Change management
During the implementation phase of a new access control system, change management is the most critical consideration because it ensures that all changes to the authentication and authorization infrastructure are controlled, tested, and approved before deployment. Without a formal change management process, misconfigurations in protocols like LDAP, RADIUS, or SAML can lead to security gaps or service outages, making it the foundational control for a successful rollout.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Control ownership assignment
Why it's wrong here
Assigning control ownership matters, but it is a governance task that can follow implementation; the implementation phase's critical dependency is that each control operates as designed before reliance. Ownership assignment is central during control design and ongoing monitoring, not the priority here.
- ✗
User training
Why it's wrong here
Training affects how users adopt the system, yet it does not determine whether the access controls themselves function correctly. User training is the priority during rollout and operation, whereas implementation must first confirm the controls enforce the intended access decisions.
- ✓
Change management
Why this is correct
Change management governs how the access control system is transitioned into production, covering impact assessment, testing, approval and rollback. This satisfies the implementation-phase constraint by controlling disruption to live access rights, preventing outages or unauthorised access during cutover.
- ✗
Documentation update
Why it's wrong here
Documentation update records the design after it is settled; it neither enforces nor verifies access decisions during implementation. It is genuinely required for audit evidence and operational handover once the system is live, which makes it tempting, but the implementation phase demands validating that access rules actually restrict entitlements as intended.
Quick reference
AAA Protocol Comparison
| Protocol | Port(s) | Encryption | Transport | Primary Use |
|---|---|---|---|---|
| RADIUS | 1812 / 1813 | Password only | UDP | Network access control |
| TACACS+ | 49 | Full packet | TCP | Device administration |
| Diameter | 3868 | Full session | TCP / SCTP | Carrier / mobile networks |
| 802.1X | — | EAP-based | Layer 2 | Port-based access control |
TACACS+ encrypts the entire packet; RADIUS only encrypts the password field — a key exam distinction.
Go deeper
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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