Calculate the risk for each of the following: Switch L47 connects a network to t

Question

Calculate the risk for each of the following:

Switch L47 connects a network to the Internet. It is susceptible to hardware failure. It is an older piece of equipment and has a 25 percent change of an attack this year. If attacked, it has a 50 percent chance of success. Switch L47 has a value of 90 and if attacked it will be a completed loss. You estimate the assumptions are 90 percent accurate.

Risk equation:

Risk = (likelihood * attack success probability) * (asset value * probable loss) + uncertainty probability * ( (likelihood * attack success probability))

Explanation / Answer

likelihood = 25% = 0.25

attack success probability = 50% = 0.5

asset value = 90

probable loss = 100% = 1

uncertainty probability = 10% = 0.1

Risk = (likelihood * attack success probability) * (asset value * probable loss) + uncertainty probability * ( (likelihood * attack success probability))

= (0.25 * 0.5) * (90 * 1) + 0.10 * (0.25 * 0.5)

= 11.2625

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