Example-3 A company sells product via website. Website earns $ 5000 an hour in revenue. When an attack happens, website normally fails for three hours. Cost to repair is $1000.It was seen that in the previous years, website was down for at least 4 times a year. Calculate SLE, ARO, ALE for the above data. The company wishes to purchase a fail over server to reduce this problem and the cost of implementing it is $15000. If ARO can be reduced to 1 by implementing fail over server, do you think that it is a feasible option?

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