CISM Information Security Programme Practice Question
In a defence-in-depth strategy, which control is considered a compensating control when a critical application cannot be patched immediately due to operational constraints?
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
✓
Network segmentation
Compensating controls provide alternative protection when a primary control cannot be applied. Network segmentation limits the blast radius and reduces the attack surface until patching can occur.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Configuration management
Why it's wrong here
Configuration management is proactive, not a compensating control for unpatched vulnerabilities.
- ✗
Intrusion detection system (IDS)
Why it's wrong here
IDS detects but does not prevent exploitation; it is detective, not compensating.
- ✓
Network segmentation
Why this is correct
Segmenting the vulnerable application restricts access and reduces risk while patching is delayed.
- ✗
Vulnerability scanning
Why it's wrong here
Scanning identifies vulnerabilities but does not mitigate them.
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.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CISM practice question is part of Courseiva's free ISACA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CISM exam.