CSSLP · Question #245
Single Loss Expectancy (SLE) represents an organization's loss from a single threat. Which of the following formulas best describes the Single Loss Expectancy (SLE)?
The correct answer is A. SLE = Asset Value (AV) * Exposure Factor (EF). Single Loss Expectancy (SLE) quantifies the financial loss expected from a single occurrence of a specific threat.
Question
Single Loss Expectancy (SLE) represents an organization's loss from a single threat. Which of the following formulas best describes the Single Loss Expectancy (SLE)?
Options
- ASLE = Asset Value (AV) * Exposure Factor (EF)
- BSLE = Annualized Loss Expectancy (ALE) * Annualized Rate of Occurrence (ARO)
- CSLE = Annualized Loss Expectancy (ALE) * Exposure Factor (EF)
- DSLE = Asset Value (AV) * Annualized Rate of Occurrence (ARO)
How the community answered
(19 responses)- A89% (17)
- C5% (1)
- D5% (1)
Why each option
Single Loss Expectancy (SLE) quantifies the financial loss expected from a single occurrence of a specific threat.
The formula SLE = Asset Value (AV) * Exposure Factor (EF) accurately calculates the potential financial loss from a single security incident. Asset Value represents the monetary worth of the asset, while Exposure Factor is the percentage of loss that would occur to the asset if a specific threat materializes.
This formula incorrectly combines ALE and ARO; ALE (Annualized Loss Expectancy) itself is derived from SLE and ARO.
This formula incorrectly combines ALE and EF; ALE is a measure of annual loss, not a factor in single event loss calculation.
This formula incorrectly combines Asset Value with ARO; ARO (Annualized Rate of Occurrence) measures how often a threat is expected to occur annually, not the loss from a single event.
Concept tested: Risk assessment calculation - Single Loss Expectancy
Source: https://csrc.nist.gov/glossary/term/single_loss_expectancy
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