Which of the following would BEST be used to calculate the expected loss of an event, if the likelihood of
an event occurring is known? (Select TWO).
A.
DAC
B.
ALE
C.
SLE
D.
ARO
E.
ROI
Explanation:
ALE (Annual Loss Expectancy) is equal to the SLE (Single Loss Expectancy) times the annualized rate of
occurrence. SLE (Single Loss Expectancy) is equal to asset value (AV) times exposure factor (EF).
Incorrect Answers:
A: DAC is short for Discretionary Access Control which allows some information sharing flexibility
capabilities within the network.
D: ARO (annualized rate of occurrence) is the frequency (in number of years) that an event can be
expected to happen.
E: ROI (Rate Of Investment) is the benefit (return) of an investment is divided by the cost of the
investment; the result is expressed as a percentage or a ratio.Dulaney, Emmett and Chuck Eastton, CompTIA Security+ Study Guide, 6th Edition, Sybex, Indianapolis,
2014, pp. 5-6