CompTIA Security Plus Mock Test Q840

An administrator wants to ensure that the reclaimed space of a hard drive has been sanitized while the computer is in use. Which of the following can be implemented?

A. Cluster tip wiping
B. Individual file encryption
C. Full disk encryption
D. Storage retention

Correct Answer: A
Section: Application, Data and Host Security

Explanation:
A computer hard disk is divided into small segments called clusters. A file usually spans several clusters but rarely fills the last cluster, which is called cluster tip. This cluster tip area
may contain file data because the size of the file you are working with may grow or shrink and needs to be securely deleted.

Incorrect Answers:
B: File encryption encrypts the content of a specified file to protect it from access by unauthorised users. It does not sanitise the reclaimed space on a hard drive.
C: Full-disk encryption encrypts the data on the device. This feature ensures that the data on the device cannot be accessed in a useable form should the device be stolen. It does not
sanitise the reclaimed space on a hard drive.
D. Storage retention, or data retention, is a policy for handling data, particularly sensitive data, within an organization. It is not related to sanitizing the reclaimed space on a hard drive.

References:
Dulaney, Emmett and Chuck Eastton, CompTIA Security+ Study Guide, 6th Edition, Sybex, Indianapolis, 2014, pp. 418-419
Stewart, James Michael, CompTIA Security+ Review Guide, Sybex, Indianapolis, 2014, pp. 236, 237, 252
CCleaner – How to configure CCleaner to wipe cluster tips on drive