An email attachment from an external supplier is not blocked by signature-based AV, but the SOC wants to see whether it drops files, launches child processes, or contacts suspicious domains before delivery to users. Which control best fits?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
Distractor review
Network IDS, because it passively monitors traffic for known threats.
An IDS can alert on patterns, but it does not safely execute the attachment to observe behavior.
Best answer
Sandboxing, because it detonates the file in an isolated environment.
A sandbox can safely execute the attachment and reveal malicious actions such as file drops, process spawning, and outbound callbacks.
Distractor review
DLP, because it prevents sensitive data from leaving the organization.
DLP focuses on data leakage and policy enforcement, not behavioral analysis of suspicious attachments.
Distractor review
NAC, because it controls whether a device can join the network.
NAC governs device access to network resources, but it does not inspect or detonate email attachments.
Common exam trap
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Technical deep dive
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
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More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
Question 1
A laptop is suspected of being used in a malware incident. It is still powered on and connected to Wi-Fi. What should the responder do before shutting it down?
Question 2
An employee reports a ransomware note on a file server. The server is still powered on, shares are still being accessed, and management wants service restored as quickly as possible. What should the incident response team do first?
Question 3
An employee reports a ransomware note on a finance laptop. The laptop is still powered on, connected to Wi-Fi, and the user says they were just working in a spreadsheet. Management wants the fastest safe response that also preserves evidence. What should the responder do first?
Question 4
You are handed a company laptop suspected in an insider theft case. Legal says the evidence may be needed in court. Which action best preserves admissibility?
Question 5
A developer wants to reduce the risk of SQL injection in a new customer search form. Which two changes are the best mitigations? Select two.
Question 6
A branch office uses a flat LAN, and a compromise on one user workstation could spread quickly to finance systems. Management wants finance workstations isolated from general users, but finance staff still need access to a central finance application and network printer. What is the best design change?
FAQ
Questions learners often ask
What does this SY0-701 question test?
Static NAT maps one inside address to one outside address.
What is the correct answer to this question?
The correct answer is: Sandboxing, because it detonates the file in an isolated environment. — Sandboxing is the best choice because it opens the file in an isolated environment and observes what it does in real time. That makes it especially useful when signature-based detection misses a new or modified attachment. Analysts can see whether the file creates processes, writes files, contacts external servers, or exhibits other malicious behavior before the message is released to users. Why others are wrong: An IDS only observes and alerts on traffic; it does not execute attachments. DLP focuses on protecting sensitive content from leaving the organization, which is a different problem. NAC controls device admission to the network and has no role in safely detonating email files.
What should I do if I get this SY0-701 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
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