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SSCP Practice Question: Which THREE are effective controls against…
Which THREE are effective controls against internal network threats?
⚠ Common exam trap
ISC2 often tests the distinction between detection and prevention, so candidates mistakenly choose IDS (C) as a control against internal threats, but it only detects, not blocks, unlike network segmentation or DLP which actively prevent or contain threats.
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
Network segmentation (A) is effective because it divides the network into isolated segments, limiting lateral movement of threats. By using VLANs or firewalls, an attacker who compromises one segment cannot easily access other critical systems, reducing the blast radius of an internal breach.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Network segmentation
Why this is correct
Isolates sensitive systems to contain breaches.
- ✓
Employee security awareness training
Why this is correct
Educates users to avoid risky actions.
- ✗
Intrusion detection system (IDS)
Why it's wrong here
Detects but does not prevent internal threats.
- ✗
Single sign-on (SSO)
Why it's wrong here
Convenience feature, not a security control against internal threats.
- ✓
Data loss prevention (DLP)
Why this is correct
Monitors and blocks unauthorized data transfers.
Visual reference
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 SSCP practice question is part of Courseiva's free ISC2 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 SSCP exam.