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Mean Time to Detect (MTTD)

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Mean Time to Detect (MTTD) is a security metric that represents the average time taken by an organization to identify a security incident. This metric is essential to comprehend the performance of security monitoring and detection systems in place. A lower MTTD means quicker identification of threa…

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CISSP - Mean Time to Detect (MTTD) Example Questions

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Question 1

An organization wants to improve their Mean Time to Detect (MTTD) for security incidents. Which of the following would best help them achieve this goal?

Correct Answer: Implementing continuous monitoring and automated alerting systems.

Implementing continuous monitoring and automated alerting systems helps to detect security incidents faster, thus reducing the MTTD. Other options may help improve security but do not directly contribute to a faster detection time.

Question 2

A security manager is reviewing the Mean Time to Detect (MTTD) across several incidents. During 3 incidents, the respective MTTD values were 2 hours, 4 hours, and 6 hours. What is the average MTTD for these incidents?

Correct Answer: 4 hours

To calculate the average MTTD, we need to add the MTTD values of the incidents (2 + 4 + 6) and divide by the number of incidents (3). (2 + 4 + 6) / 3 = 12 / 3 = 4 hours.

Question 3

A security analyst is asked to reduce the Mean Time to Detect (MTTD) for sensitive data being exfiltrated from the company's internal network. Which of the following is the most effective approach?

Correct Answer: Implementing Data Loss Prevention (DLP) tools.

Implementing Data Loss Prevention (DLP) tools would be the most effective approach in reducing MTTD for sensitive data exfiltration, as it focuses on monitoring, detecting, and preventing data breaches. Other options may improve the overall security posture, but they do not directly address the issue of detecting data exfiltration.

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