- A
Least privilege
Why wrong: Least privilege is partially applied because the firewall restricts communication to only necessary ports and sources, but the overarching design philosophy is the combination of multiple, overlapping controls, which is defense in depth.
- B
Defense in depth
Correct. The design uses network segmentation, firewalls, and encryption to create multiple layers of defense. This is the core concept of defense in depth, ensuring that a failure in one layer does not compromise the entire system.
- C
Separation of duties
Why wrong: Separation of duties involves dividing critical administrative tasks among multiple people to prevent fraud or error. It does not apply to network topology or firewall rules.
- D
Zero trust
Why wrong: Zero trust requires that no entity is inherently trusted and that every access request must be authenticated and authorized. In this design, the web servers are implicitly trusted to initiate connections to the internal servers once the firewall rule is in place, which does not fully align with zero trust principles.
Quick Answer
The answer is defense in depth. This design is correct because it implements multiple, overlapping security layers—a DMZ isolates public-facing web servers, a stateful firewall restricts inbound traffic to HTTP/HTTPS only, and outbound connections from the web servers to internal application servers are limited to a specific TCP port with TLS encryption—so that if one control fails, others still protect sensitive internal systems. On the Security+ SY0-701 exam, this principle tests your understanding that security is not a single solution but a layered strategy; a common trap is to mistake this for “least privilege” or “network segmentation” alone, but defense in depth explicitly requires multiple distinct controls working together. Remember the mnemonic “Layers Stop Attacks”: each layer (DMZ, firewall, access control) stops an attacker from reaching the next, making the whole system resilient to single-point failures.
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.
A security architect is designing a new data center network that will host public-facing web servers and internal application servers handling confidential employee data. The architect places the web servers in a DMZ and the internal application servers on a separate internal network segment. A stateful firewall is configured to allow inbound HTTP/HTTPS traffic from the internet to the web servers only. The firewall also permits only the web servers to initiate outbound connections to the internal application servers on a specific TCP port, and all such traffic is encrypted using TLS. Which security architecture principle is this design primarily intended to enforce?
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
Defense in depth
The design enforces defense in depth by layering multiple security controls: a DMZ isolates public-facing web servers from internal networks, a stateful firewall restricts inbound traffic to HTTP/HTTPS only, and outbound connections from web servers to internal application servers are limited to a specific TCP port with TLS encryption. This layered approach ensures that even if one control fails (e.g., a web server is compromised), the attacker still faces additional barriers to reach sensitive internal systems.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Least privilege
Why it's wrong here
Least privilege is partially applied because the firewall restricts communication to only necessary ports and sources, but the overarching design philosophy is the combination of multiple, overlapping controls, which is defense in depth.
- ✓
Defense in depth
Why this is correct
Correct. The design uses network segmentation, firewalls, and encryption to create multiple layers of defense. This is the core concept of defense in depth, ensuring that a failure in one layer does not compromise the entire system.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Separation of duties
Why it's wrong here
Separation of duties involves dividing critical administrative tasks among multiple people to prevent fraud or error. It does not apply to network topology or firewall rules.
- ✗
Zero trust
Why it's wrong here
Zero trust requires that no entity is inherently trusted and that every access request must be authenticated and authorized. In this design, the web servers are implicitly trusted to initiate connections to the internal servers once the firewall rule is in place, which does not fully align with zero trust principles.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse 'defense in depth' with 'least privilege' because both involve restricting access, but defense in depth specifically refers to multiple overlapping security layers (network segmentation, firewalls, encryption) rather than minimal permissions for a single component.
Detailed technical explanation
How to think about this question
Defense in depth in this context relies on the stateful firewall's ability to track connection states (e.g., TCP handshake sequence numbers) and enforce rules based on both direction and protocol. The DMZ acts as a buffer zone where web servers are exposed to the internet but cannot directly initiate connections to internal servers unless explicitly permitted, and TLS (typically TLS 1.2 or 1.3) ensures encryption of the application data in transit, preventing eavesdropping or tampering even if an attacker gains access to the DMZ segment.
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: Defense in depth — The design enforces defense in depth by layering multiple security controls: a DMZ isolates public-facing web servers from internal networks, a stateful firewall restricts inbound traffic to HTTP/HTTPS only, and outbound connections from web servers to internal application servers are limited to a specific TCP port with TLS encryption. This layered approach ensures that even if one control fails (e.g., a web server is compromised), the attacker still faces additional barriers to reach sensitive internal systems.
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.
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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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