The security manager is in the process of writing a business case to replace a legacy secure web gateway so as to meet an availability requirement of 99.9% service availability. According to the vendor, the newly acquired firewall has been rated with an MTBF of 10,000 hours and has an MTTR of 2 hours. This equates to 1.75 hours per year of downtime.
Based on this, which of the following is the MOST accurate statement?
A . The firewall will meet the availability requirement because availability will be 99.98%.
B . The firewall will not meet the availability requirement because availability will be 85%.
C . The firewall will meet the availability requirement because availability will be 99.993%.
D . The firewall will not meet the availability requirement because availability will be 99.2%.
Answer: A
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