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The change of a hard drive failure is once every three years. The cost to buy a new hard drive is $300.

It will require 10 hours to restore the OS and software to the new hard disk. It will require a further 4 hours to restore the database from the last backup to the new hard disk. The recovery person earns $10/hour. Calculate the SLE, ARO, and

ALE. Assume the EF = 1(100%). What is the closest approximate cost of this replacement and recovery operation per year?

A.
$1320
Answers
A.
$1320
B.
$440
Answers
B.
$440
C.
$100
Answers
C.
$100
D.
$146
Answers
D.
$146
Suggested answer: D

Explanation:

1. AV (Asset value) = $300 + (14 * $10) = $440 - the cost of a hard drive plus the work of a recovery person, i.e.how much would it take to replace 1 asset? 10 hours for resorting the OS and soft + 4 hours for DB restore multiplies by hourly rate of the recovery person.

2. SLE (Single Loss Expectancy) = AV * EF (Exposure Factor) = $440 * 1 = $440 3. ARO (Annual rate of occurrence) = 1/3 (every three years, meaning the probability of occurring during 1 years is 1/3) 4. ALE (Annual Loss Expectancy) =

SLE * ARO = 0.33 * $440 = $145.2

asked 18/09/2024
Maximo Ian Canino
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