CND Network Perimeter Protection Practice Question
An organization is hardening its perimeter firewall configuration against reconnaissance and volumetric attacks. Which THREE best practices should be implemented? (Choose THREE)
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
✓
Deploying zone protection or flood protection profiles against SYN and UDP floods
Firewall hardening best practices include disabling unnecessary management services on external interfaces, implementing anti-spoofing (uRPF), and utilizing zone protection profiles.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Deploying zone protection or flood protection profiles against SYN and UDP floods
Why this is correct
Flood protection profiles safeguard firewall resources from volumetric attacks.
- ✓
Disabling remote management (SSH/HTTPS) on the external untrusted interface
Why this is correct
Management interfaces should never be exposed directly to the public internet.
- ✓
Enabling Reverse Path Forwarding (uRPF) to prevent IP spoofing
Why this is correct
uRPF drops packets with spoofed source addresses.
- ✗
Leaving default administrator credentials unchanged for rapid access
Why it's wrong here
Leaving default credentials is a critical security vulnerability.
- ✗
Permitting all inbound ICMP echo requests without rate limiting
Why it's wrong here
Unrestricted ICMP can facilitate network mapping and DoS floods.
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.