3.3 Explain high availability and disaster recovery concepts and summarize best solution.

Question 1

What Key Performance Indicator (KPI) measures the expected lifetime of a product? This is for assets meant to be replaced versus repaired. The calculation is the total lifetime of all devices divided by the number of failures.

Answer 1

Mean Time Between Failures (MTBF)

Question 2

What KPI defines the mean time it takes to repair assets or correct a fault to the point of restoration and recovery of network services?

Answer 2

Mean Time to Repair (MTTR)

Question 3

What metric states the requirement for a business function and is used to measure the level of High Availability (HA)?

Answer 3

Maximum Tolerable Downtime (MTD)

Question 4

What describes the period following a disaster that an individual IT system may remain offline?

Answer 4

Recovery time objective (RTO)

Question 5

What describes the maximum amount of data loss permitted, measured in units of time (seconds, minutes, hours, or days)?

Answer 5

Recovery point objective (RPO)