SSCP Network and Communications Security Practice Question
An organization wants to ensure that only corporate-managed devices can connect to the internal network. Non-compliant devices should be placed in a restricted VLAN with limited access. Which technology should be deployed?
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 Access Control (NAC)
Network Access Control (NAC) with 802.1X can enforce policies, quarantine non-compliant devices, and assign appropriate VLANs.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Virtual Private Network (VPN)
Why it's wrong here
VPNs provide secure remote access, not network access control.
- ✓
Network Access Control (NAC)
Why this is correct
NAC integrates with authentication to enforce compliance and VLAN assignment.
- ✗
Stateful firewall
Why it's wrong here
Firewalls control traffic but do not assess device compliance.
- ✗
Intrusion Prevention System (IPS)
Why it's wrong here
IPS monitors for attacks, not device compliance.
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.