Which of the following is NOT a Business Continuity Planning (BCP) concept?

A. Maximum Tolerable Downtime (MTD)
B. Minimum Required Bandwidth (MRB)
C. Recovery Time Objective (RTO)
D. Recovery Point Objective (RPO)

Answer: B

Explanation:

A. Maximum Tolerable Downtime (MTD)

MTD (sometimes called Maximum Allowable Downtime) is the most critical metric in BCP.

• The Concept: It represents the absolute maximum time a business function can be inoperable before the organization suffers "irreparable harm."  This harm could be bankruptcy, loss of life, or a complete loss of public trust. 

•  The Rule: Your RTO must always be less than or equal to your MTD.  If a process must be back in 24 hours (MTD) but your IT team needs 48 hours to fix it (RTO), the plan fails. 

B. Minimum Required Bandwidth (MRB)

MRB is a Networking/Operational term, not a core BCP metric.

• Why it's the Answer: While an engineer might calculate the bandwidth needed for off-site replication, "Minimum Required Bandwidth" is not a standardized term used to define the business continuity requirements during a Business Impact Analysis (BIA). BCP focuses on time and data, not specific network throughput specifications.

C. Recovery Time Objective (RTO)

RTO is the target time set for the resumption of a product, service, or activity after a disaster.  

• The Concept: This is the "deadline" for the IT team. It is a subset of the MTD. If the MTD for the payroll system is 3 days, management might set an RTO of 24 hours to ensure there is a "safety buffer."

D. Recovery Point Objective (RPO)

RPO defines the maximum age of files that must be recovered from backup storage for operations to resume.  

• The Concept: This is essentially a measurement of acceptable data loss.  If you back up your database every night at midnight and a crash happens at 11:00 PM, you have lost 23 hours of data. If your RPO was 4 hours, your current backup strategy is non-compliant.