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Quick Answer
The answer is a DMZ, data diode, and jump box. These three architectural controls work together to enforce strict ICS network isolation by creating a controlled buffer zone, enforcing unidirectional data flow, and providing managed administrative access. A DMZ sits between the ICS and corporate IT networks, allowing traffic inspection and filtering without direct exposure, while a data diode physically prevents any inbound traffic from reaching the ICS, ensuring that only outbound data can pass. A jump box (or bastion host) provides a hardened, audited gateway for authorized administrators to access the ICS without exposing it to the broader network. On the Security+ SY0-701 exam, this tests your understanding of network segmentation and secure architecture design for operational technology environments. A common trap is confusing a firewall with a data diode—remember, a firewall can be misconfigured to allow bidirectional traffic, but a data diode is physically one-way. Memory tip: “DJD” for DMZ, Jump box, Data diode—think of a DJ isolating the crowd from the stage.
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.
A company is designing a secure industrial control system (ICS) network that must be isolated from the corporate IT network. Which three of the following architectural controls 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
✓
Deploy a unidirectional gateway to allow data to flow only from the ICS to the corporate network.
A unidirectional gateway (data diode) ensures that data can only flow from the ICS to the corporate network, preventing any external traffic from reaching the ICS. This is a critical security control for isolating sensitive industrial control systems from potential cyber threats originating from the corporate IT network.
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 might think a standard router or direct connection is acceptable for low latency, but CompTIA emphasizes that isolation and security take precedence over performance in ICS environments.
Detailed technical explanation
How to think about this question
A unidirectional gateway typically uses fiber-optic technology to physically enforce one-way data flow, ensuring that no electrical or logical signal can travel back to the source. Jump boxes (bastion hosts) are hardened servers that provide a single point of entry for administrative access, and when combined with multi-factor authentication, they enforce strong authentication and audit logging. The DMZ acts as a buffer zone where traffic between the ICS and corporate networks can be inspected by firewalls and intrusion prevention systems, often using protocols like Modbus/TCP or DNP3 that are filtered to allow only specific commands.
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.
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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: Deploy a unidirectional gateway to allow data to flow only from the ICS to the corporate network. — A unidirectional gateway (data diode) ensures that data can only flow from the ICS to the corporate network, preventing any external traffic from reaching the ICS. This is a critical security control for isolating sensitive industrial control systems from potential cyber threats originating from the corporate IT network.
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
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