Which of the following defines a business goal for system restoration and acceptable data loss?

A.
MTTR

B.
MTBF

C.
RPO

D.
Warm site

Explanation:
The recovery point objective (RPO) defines the point at which the system needs to be restored. This could
be where the system was two days before it crashed (whip out the old backup tapes) or five minutes
before it crashed (requiring complete redundancy). This is an essential business goal insofar as system
restoration and acceptable data loss is concerned.
Incorrect Answers:
A: The mean time to restore (MTTR) is the measurement of how long it takes to repair a system or
component once a failure occurs. This means it has to do with TIME lost not data loss restoration per se.
B: The mean time between failures (MTBF) is the measure of the anticipated incidence of failure for a
system or component. This measurement determines the component’s anticipated lifetime. This is thus
also a TIME issue.
D: A warm site provides some of the capabilities of a hot site; it must provide computer systems and
compatible media capabilities.

Dulaney, Emmett and Chuck Eastton, CompTIA Security+ Study Guide, 6th Edition, Sybex, Indianapolis,
2014, pp. 9, 444