You are an advisory board member for a organization that has

You are an advisory board member for a organization that has decided to go forward with a proposed Internet and email connectivity project. Here are the projected details:

24 computers connected to the Internet

95% probability of virus infection

10 paid employees who make $9 an hour

A successful virus outage could bring down the network for an entire day

25 copies of antivirus software will cost the nonprofit $399

The CEO would like to know how much money, if any, will be saved through the purchase of antivirus software. How much money will be saved?

A. $218

B. $285

C. $380

D. $490

Solution

B. Annual loss expectancy is calculated this way:

ALE = ARO × SLE, or .95 × 720 = $684

The annual savings is the ALE minus the cost of the deterrent, or $684 $399 = $285. Therefore, answers A, C, and D are incorrect.