CND Network Attacks And Defense Strategies Practice Question
An organization wants to protect its internal network against unauthorized DHCP servers (DHCP spoofing and rogue DHCP starvation attacks). Which switch security feature should be enabled on all untrusted access switch ports?
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 globally and configure untrusted user access ports as untrusted.
DHCP snooping acts as a firewall between trusted and untrusted DHCP servers. It drops DHCP offer/ack messages coming from untrusted ports while building a trusted DHCP binding database.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Enable DHCP Snooping globally and configure untrusted user access ports as untrusted.
Why this is correct
DHCP snooping blocks rogue DHCP servers on untrusted ports and tracks IP-to-MAC bindings.
- ✗
Activate IP Source Guard with static binding entries on all edge switch ports.
Why it's wrong here
IP Source Guard filters traffic based on DHCP snooping bindings, but DHCP snooping is the prerequisite feature.
- ✗
Configure Dynamic ARP Inspection (DAI) on all trunk ports connecting to core switches.
Why it's wrong here
DAI prevents ARP poisoning, and trunk ports are typically configured as trusted, not untrusted.
- ✗
Enable Port Security with maximum MAC address limits and restrict violation actions.
Why it's wrong here
Port security limits MAC addresses, but does not filter rogue DHCP server traffic.
Visual reference
About these practice questions
One of 323 original CND practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official EC-Council exam blueprint
This CND practice question is part of Courseiva's free EC-Council 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 CND exam.