ISC2 CC Network Security Practice Question
A network administrator is designing a DMZ to host a web server, an email server, and a DNS server. Which TWO of the following principles should be applied to secure the DMZ? (Select TWO.)
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
✓
Use a firewall to control traffic between the DMZ and internal network.
Proper segmentation and access control are key; placing servers on separate VLANs and restricting inbound/outbound traffic with firewalls are essential.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Use a firewall to control traffic between the DMZ and internal network.
Why this is correct
A firewall enforces strict access rules from DMZ to internal.
- ✗
Place all DMZ servers on the same VLAN to simplify management.
Why it's wrong here
This reduces segmentation and increases risk if one server is compromised.
- ✓
Implement separate VLANs for each type of server to limit lateral movement.
Why this is correct
VLAN segmentation isolates compromised servers.
- ✗
Allow all outbound traffic from the DMZ to the internet for ease of use.
Why it's wrong here
Unrestricted outbound traffic can be exploited.
- ✗
Disable logging on DMZ devices to conserve resources.
Why it's wrong here
Logging is crucial for monitoring and incident response.
Visual reference
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Related to this question
Learn chapter
Introduction to Security Principles
Key term
DNS
DNS is the system that translates human-friendly domain names like example.com into machine-readable IP addresses so computers can find each other on a network.
Key term
Access control
Access control is the security practice of determining who or what is allowed to view, use, or enter a resource, and under what conditions.
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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.