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CAS-005 · Question #226

CAS-005 Question #226: Real Exam Question with Answer & Explanation

The correct answer is D: Deploying sandboxing. To significantly improve an email security solution on an email gateway, deploying sandboxing provides enhanced protection against advanced and unknown threats.

Submitted by lars.no· Mar 6, 2026Security Operations

Question

During a review of the email security solution, a security analyst collects the following information: Which of the following is the best way to improve the email security solution on the email gateway?

Options

  • AEnabling allow lists
  • BConfiguring signature-based detection
  • CImplementing a HIDS
  • DDeploying sandboxing

Explanation

To significantly improve an email security solution on an email gateway, deploying sandboxing provides enhanced protection against advanced and unknown threats.

Common mistakes.

  • A. Enabling allow lists (whitelisting) can reduce unwanted email but is prone to configuration errors and does not protect against malicious content from legitimate but compromised senders.
  • B. Configuring signature-based detection is a foundational security measure but is reactive and ineffective against novel, polymorphic malware or zero-day exploits without known signatures.
  • C. Implementing a HIDS (Host-based Intrusion Detection System) monitors individual endpoints, which is valuable for host-level security, but it does not improve the email gateway's ability to stop threats before they reach the endpoint.

Concept tested. Advanced email gateway security features

Reference. https://www.kaspersky.com/resource-center/definitions/what-is-sandboxing

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