Which of the following statements about the availability concept of Information security management is true?

A.
It ensures that unauthorized modifications are not made to data by authorized personnel or processes.

B.
It ensures that modifications are not made to data by unauthorized personnel or processes.

C.
It ensures reliable and timely access to resources.

D.
It determines actions and behaviors of a single individual within a system.

Explanation:

The concept of availability ensures reliable and timely access to data or resources. In other words, availability ensures that the systems are up and running when needed. The availability concept also ensures that the security services are in working order.

Answer options B and A are incorrect. The concept of integrity ensures that modifications are not made to data by unauthorized personnel or processes. It also ensures that unauthorized modifications are not made to data by authorized personnel or processes.

Answer option D is incorrect. Accountability determines the actions and behaviors of an individual within a system, and identifies that particular individual. Audit trails and logs support accountability.

Reference: "http://en.wikipedia.org/wiki/Information_security"