Network Operations Chapter 18

Question 1

Define Recovery Time Objective (RTO)

Answer 1

Amount of time needed to restore full functionality from when the organization ceases to function.

Question 2

Define Mean Time Between Failures (MTBF)

Answer 2

Factor typically applied to a hardware component that represents the manufacturers best guess (based on historical data) regarding how much time will pass between major failures of that component.

Question 3

Define Mean Time To Failure (MTTF)

Answer 3

Indicates the length of time a device is expected to last in operation. In MTTF only a single definitive failure will occur and requires the device to be replaced.

Question 4

Define Cold Site

Answer 4

Location that consists of a building, facilities, desks, and everything a business needs, except computers.

Question 4

Define Mean Time to Repair (MTTR)

Answer 4

ETA of time it takes to replace or fix a failed system

Question 5

Define Warm Site

Answer 5

Facility with all physical resources computers and network infrastructure to recover from a primary site disaster. Warm site does not have current back up data and may take a day or more to recover and install backups before business operations can recommence.

Question 5

Define Hot Site

Answer 5

Complete back up facility to continue business operations, considered “hot” because it has all resources in place including computers network infrastructure and current back ups so that operations can commence within hours after occupation.

Question 6

Define Recovery Point Objective (RPO)

Answer 6

Upper limit to how much lost data an organization can tolerate if it must restore from a backup. Effectively dictates how frequently backups must be taken.