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Question 23 - N10-009 discussion

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Which of the following disaster recovery concepts is calculated by dividing the total hours of operation by the total number of units?

A.
MTTR
Answers
A.
MTTR
B.
MTBF
Answers
B.
MTBF
C.
RPO
Answers
C.
RPO
D.
RTO
Answers
D.
RTO
Suggested answer: B

Explanation:

Introduction to Disaster Recovery Concepts:

Disaster recovery involves strategies and measures to ensure business continuity and data recovery in the event of a disaster.

Mean Time Between Failures (MTBF):

MTBF is a reliability metric used to predict the time between failures of a system during operation. It is calculated by dividing the total operational time by the number of failures.

Formula: MTBF=TotalOperationalTimeNumberofFailures\text{MTBF} = \frac{\text{Total Operational Time}}{\text{Number of Failures}}MTBF=NumberofFailuresTotalOperationalTime

This metric helps in understanding the reliability and expected lifespan of systems and components.

Example Calculation:

If a server operates for 1000 hours and experiences 2 failures, the MTBF is: MTBF=1000hours2=500hours\text{MTBF} = \frac{1000 \text{ hours}}{2} = 500 \text{ hours}MTBF=21000hours=500hours

Explanation of the Options:

A . MTTR (Mean Time to Repair): The average time required to repair a system after a failure.

B . MTBF (Mean Time Between Failures): The correct answer, representing the average time between failures.

C . RPO (Recovery Point Objective): The maximum acceptable amount of data loss measured in time.

D . RTO (Recovery Time Objective): The target time set for the recovery of IT and business activities after a disaster.

Conclusion:

MTBF is a crucial metric in disaster recovery and system reliability, helping organizations plan maintenance and predict system performance.

CompTIA Network+ guide explaining MTBF, MTTR, RPO, and RTO concepts and their calculations (see page Ref 10How to Use Cisco Packet Tracer).

asked 02/10/2024
MIGUEL GAITERO GIL
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