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ISC2 CC Practice Question: Which THREE security mechanisms should be…
Which THREE security mechanisms should be implemented to secure a network against ARP spoofing attacks? (Choose three.)
⚠ Common exam trap
ISC2 often tests the misconception that port security or MAC filtering can prevent ARP spoofing, but these only control MAC addresses, not the IP-to-MAC bindings that ARP spoofing exploits.
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
✓
IP Source Guard
IP Source Guard (A) is correct because it uses DHCP snooping binding table entries to filter traffic on a per-port basis, dropping packets where the source IP address does not match the binding. This prevents an attacker from spoofing a legitimate host's IP address in ARP spoofing attacks by ensuring only valid IP-to-MAC mappings are allowed on the port.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
IP Source Guard
Why this is correct
Prevents IP spoofing by filtering traffic based on DHCP snooping bindings.
- ✗
Port security
Why it's wrong here
Port security limits MAC addresses but does not prevent ARP spoofing.
- ✓
Dynamic ARP Inspection (DAI)
Why this is correct
Validates ARP packets against DHCP snooping bindings.
- ✗
MAC address filtering
Why it's wrong here
MAC filtering is static and easily bypassed.
- ✓
DHCP Snooping
Why this is correct
Creates a binding table used by DAI and IP Source Guard.
Visual reference
Quick reference
Access Control Model Comparison
| Model | Acronym | Who Controls Access? | Best For |
|---|---|---|---|
| Discretionary Access Control | DAC | Resource owner | Small teams, file shares |
| Mandatory Access Control | MAC | System / security labels | Classified govt / military |
| Role-Based Access Control | RBAC | Administrator (via roles) | Enterprise environments |
| Attribute-Based Access Control | ABAC | Policy engine (user + resource attributes) | Fine-grained, dynamic policies |
| Rule-Based Access Control | RuBAC | System rules / ACLs | Firewall rules, network ACLs |
Go deeper
Related to this question
Learn chapter
Introduction to Security Principles
Key term
IP Source Guard
IP Source Guard is a network security feature that blocks IP address spoofing by verifying that each packet's source IP address matches an authorized binding assigned to that switch port.
Key term
MAC
MAC (Media Access Control) is a unique hardware identifier assigned to network interfaces for communication on a local network segment.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CC 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 CC exam.