ISC2 Systems Security Certified Practitioner (SSCP) Practice Question
During a facility audit of a colocation site slated to host 99.99 percent-uptime application servers, you discover that both the A-side and B-side UPS rooms are powered from one indoor utility transformer; the site also features a 2 m camera-monitored fence, escorted red time-expired visitor badges, and armed guards who patrol every eight hours. Which condition presents the greatest threat to your availability objective and must be corrected before signing the contract?
The A-side and B-side UPS rooms share one utility transformer located inside the facility.
Armed security personnel patrol every eight hours and record incidents in a log.
The perimeter fence is only 2 m high, although pan-tilt-zoom cameras cover it.
Visitors receive red, time-expired badges and must be escorted throughout the visit.
To meet 99.99 percent availability, each redundant power path must remain independent. Feeding both UPS branches from a single utility transformer installed inside the building creates a single point of failure-an internal fault or fire could knock out all conditioned power simultaneously. The fence height, visitor badge policy, and guard patrol frequency pertain mainly to physical or administrative security; they have far less direct impact on continuous electrical supply.
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What does it mean for redundant power paths to remain independent?
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ISC2 Systems Security Certified Practitioner (SSCP)
Security Concepts and Practices
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