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ISC2 CC Practice Question: A security team is investigating a potential ARP…
A security team is investigating a potential ARP spoofing attack on the local network. Which two measures can effectively detect or prevent such attacks? (Choose two.)
⚠ Common exam trap
ISC2 often tests the distinction between Layer 2 security features (like DAI and DHCP snooping) and Layer 3 or other mitigation techniques (like ICMP redirects or BPDU guard), leading candidates to confuse unrelated security controls with ARP-specific defenses.
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
✓
Enable DHCP snooping with Dynamic ARP Inspection.
Dynamic ARP Inspection (DAI) uses DHCP snooping binding tables to validate ARP packets, ensuring that only legitimate IP-to-MAC address mappings are accepted. This directly prevents ARP spoofing by dropping malicious ARP replies that do not match the binding table. Configuring static ARP entries on critical servers hardcodes the IP-to-MAC mapping, so the server will ignore any spoofed ARP replies attempting to redirect traffic.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Disable ICMP redirects on hosts.
Why it's wrong here
ICMP redirects are a different attack vector.
- ✓
Enable DHCP snooping with Dynamic ARP Inspection.
Why this is correct
DHCP snooping with DAI validates ARP packets against DHCP bindings.
- ✗
Use MAC address filtering on switches.
Why it's wrong here
MAC filtering limits which MACs can connect but does not prevent ARP cache poisoning.
- ✗
Enable STP BPDU guard.
Why it's wrong here
BPDU guard protects against rogue switches, not ARP spoofing.
- ✓
Configure static ARP entries on critical servers.
Why this is correct
Static ARP entries prevent spoofing of specific IPs.
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
MAC
MAC (Media Access Control) is a unique hardware identifier assigned to network interfaces for communication on a local network segment.
Key term
DHCP snooping
DHCP snooping is a network security feature that filters untrusted DHCP messages to prevent rogue DHCP servers from giving out false IP addresses.
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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.