CompTIA Security+ Question A-20

Establishing a method to erase or clear cluster tips is an example of securing which of the following?

A. Data in transit
B. Data at rest
C. Data in use
D. Data in motion

Answer: B

A computer hard disk is divided into small segments called clusters. A file stored on a hard disk 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. Data stored on the hard drive is called data at rest.