ISC2 Governance, Risk and Compliance (CGRC) Practice Question
After deploying USB data loss prevention (DLP) agents across all laptops, you must report quarterly on the control's effectiveness. Which single metric will best demonstrate whether the control is achieving its security objective?
Number of help-desk tickets related to USB device malfunctions
Trend in blocked unauthorized USB data transfer attempts per 1,000 laptops
Percentage of laptops with the DLP agent successfully installed
Total annual spending on DLP software licenses and maintenance
The goal of the USB DLP control is to stop unauthorized data leaving the organization on removable media. Tracking the trend in blocked unauthorized USB data-transfer attempts per 1,000 laptops measures how often the control detects and prevents violations, directly reflecting its effectiveness. Merely knowing how many laptops have the agent installed shows coverage, not performance. Help-desk ticket volume indicates user impact, not security success. Spending levels reveal resource use, but do not confirm that exfiltration attempts are actually being stopped.
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What is USB Data Loss Prevention (DLP)?
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Why is 'Trend in blocked unauthorized USB data transfer attempts' the best metric for measuring effectiveness?
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How can organizations use DLP effectiveness metrics to improve security over time?
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ISC2 Governance, Risk and Compliance (CGRC)
Implementation of Security and Privacy Controls
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