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Quick Answer
The answer is implementing a DMZ, as it is a key principle of defense in depth principles for network architecture that enforces traffic inspection and access controls between zones. By isolating externally facing services like web and email servers from the internal network, a DMZ ensures that even if an attacker compromises a public-facing server, they cannot directly pivot to internal resources, creating a critical security boundary. On the Security+ SY0-701 exam, this concept tests your understanding of layered network segmentation and how each zone enforces specific trust levels; a common trap is confusing a DMZ with a VPN, but remember that a DMZ controls east-west traffic between zones, while a VPN secures north-south remote access. To recall this, use the mnemonic “D-M-Z: Don’t Mix Zones,” emphasizing that public and private networks must never share a direct path.
SY0-701 Security Architecture Practice Question
This SY0-701 practice question tests your understanding of security architecture. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Which four of the following are key principles of secure network architecture design that help enforce defense-in-depth? (Choose four.)
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
✓
Implementing a demilitarized zone (DMZ) for externally facing services
Implementing a DMZ isolates externally facing services (e.g., web, email) from the internal network, ensuring that if an attacker compromises a public-facing server, they cannot directly pivot to internal resources. This is a foundational defense-in-depth layer that enforces traffic inspection and access controls between zones.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often think a single perimeter appliance is sufficient for security, but CompTIA emphasizes that defense-in-depth requires multiple, diverse controls—not a single device—to avoid a single point of failure.
Detailed technical explanation
How to think about this question
Defense-in-depth relies on layered controls such as DMZs, VLANs, NAC, and VPNs to create multiple barriers. For example, a DMZ typically uses a three-legged firewall architecture (inside, outside, DMZ) with stateful inspection and strict ACLs, while VLANs leverage 802.1Q tagging to isolate traffic at Layer 2, often paired with firewall rules to control inter-VLAN routing. NAC (e.g., 802.1X) authenticates devices before they can access the network, enforcing posture checks and preventing unauthorized endpoints from connecting.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A developer is choosing between AES-256 (symmetric) and RSA-2048 (asymmetric) for encrypting a large file that will be sent to a partner. Symmetric encryption is fast but requires key exchange; asymmetric is slower but solves the key distribution problem. A hybrid approach — encrypt the file with AES, encrypt the AES key with RSA — is standard. Questions like this test whether you understand when each approach applies.
What to study next
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FAQ
Questions learners often ask
What does this SY0-701 question test?
Security Architecture — This question tests Security Architecture — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Implementing a demilitarized zone (DMZ) for externally facing services — Implementing a DMZ isolates externally facing services (e.g., web, email) from the internal network, ensuring that if an attacker compromises a public-facing server, they cannot directly pivot to internal resources. This is a foundational defense-in-depth layer that enforces traffic inspection and access controls between zones.
What should I do if I get this SY0-701 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Same concept, more angles
1 more ways this is tested on SY0-701
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. Match each design requirement to the best security architecture control. Use each control once.
hardWhy : Defense in depth uses layered controls, least privilege minimizes risk, separation of duties prevents fraud, fail secure avoids insecure states, secure defaults reduce misconfiguration, and complete mediation ensures consistent enforcement.
Last reviewed: Jun 11, 2026
This SY0-701 practice question is part of Courseiva's free CompTIA 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 SY0-701 exam.
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