The correct design is a demilitarized zone (DMZ) for the public web server, which isolates the public-facing website from the internal network while keeping it reachable from the internet. This works because a DMZ creates a buffer network segment where the web server resides, allowing inbound HTTP/HTTPS traffic through a firewall while blocking direct external access to the database and file servers on the internal network. On the Security+ SY0-701 exam, this scenario tests your understanding of network segmentation and firewall rule placement—a common trap is confusing a DMZ with a screened subnet or thinking a VPN alone provides isolation. The key is remembering that a DMZ is specifically designed to host public services that need controlled access to internal resources, not to expose them directly. Memory tip: think "DMZ = demilitarized zone = no-man's land between the internet and your internal fortress."
SY0-701 Security Architecture Practice Question
This SY0-701 practice question tests your understanding of security architecture. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
An organization is placing its public-facing website behind a new security design. The site must be reachable from the internet, but the database and file servers must stay isolated from direct external access. What design should the architect use?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create a demilitarized zone (DMZ) for the public web server.
A demilitarized zone (DMZ) is a network segment that isolates public-facing services, such as a web server, from the internal network. By placing the web server in the DMZ, the organization allows internet traffic to reach the website while keeping the database and file servers on the internal network, which are not directly accessible from the internet. This design enforces a security boundary where only necessary traffic (e.g., HTTP/HTTPS) is permitted through firewall rules, preventing direct external access to sensitive backend 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.
✗
Place the web server on the internal user subnet so it can reach the database directly.
Why it's wrong here
This would expose internal systems more directly and does not create a screened buffer zone.
✓
Create a demilitarized zone (DMZ) for the public web server.
Why this is correct
A DMZ places internet-facing services in a separate network segment, reducing exposure of trusted internal systems.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use a VPN concentrator so the website can be accessed securely from outside.
Why it's wrong here
A VPN is for authenticated remote user access, not for hosting a public web service safely.
✗
Use network address translation (NAT) on the web server to hide its IP address.
Why it's wrong here
NAT can hide addressing, but it does not provide a protected buffer network for the service.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse NAT or VPN as security controls for isolation, when in fact they do not provide network segmentation; the DMZ is the only design that creates a physical or logical boundary to isolate public-facing servers from internal resources.
Detailed technical explanation
How to think about this question
In a DMZ architecture, the web server typically resides on a separate network segment with its own firewall rules, often using a three-legged firewall or a pair of firewalls to control traffic between the internet, DMZ, and internal network. The web server may use reverse proxy or application-layer filtering to further inspect traffic before forwarding requests to internal database servers via specific, restricted ports (e.g., TCP 3306 for MySQL or 1433 for MSSQL). A common real-world scenario is a web application that queries a backend database; the DMZ ensures that even if the web server is compromised, the attacker cannot directly pivot to the internal network without crossing additional firewall rules.
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 security analyst at a medium-sized enterprise encounters this scenario during an investigation or architecture review. The correct answer reflects best practice for the specific threat or control described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Security exam questions test whether you can match controls to threats in context — not just recall definitions.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this SY0-701 question in full detail.
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: Create a demilitarized zone (DMZ) for the public web server. — A demilitarized zone (DMZ) is a network segment that isolates public-facing services, such as a web server, from the internal network. By placing the web server in the DMZ, the organization allows internet traffic to reach the website while keeping the database and file servers on the internal network, which are not directly accessible from the internet. This design enforces a security boundary where only necessary traffic (e.g., HTTP/HTTPS) is permitted through firewall rules, preventing direct external access to sensitive backend 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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Question Discussion
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