Chapter 9: Implementing Controls to Protect Assets

Question 1

RAID-0

Answer 1

Striping
No redundancy or fault tolerance
File spread across multiple physical disks

Question 2

RAID-1

Answer 2

Mirroring
Two disks
Copying data from one disk to another

Question 3

RAID-5

Answer 3

Striping with parity
Three disks
One disk failure

Question 4

RAID-6

Answer 4

Striping with an additional parity block
Four disks
Two disk failure

Question 5

RAID-10

Answer 5

Mirroring and striping
Four disks
Add multiples of two disks at a time

Question 6

Disk Multipath

Answer 6

Separate data transfer path to and from storage

Question 7

Differential backup

Answer 7

Backs up all the data that has changed since the last full backup
Reduces the amount of time to restore

Question 8

Incremental backup

Answer 8

Backs up all the data that has changed since the last incremental backup
Reduce the amount of time needed to perform

Question 9

Recovery Time Objective (RTO)

Answer 9

The maximum amount of time it should take to restore a system

Question 10

Recovery Point Objective (RPO)

Answer 10

The maximum amount of data you can afford to lose

Question 11

Mean time between failure (MTBF)

Answer 11

The measure of a system’s reliability

Question 12

Mean time to repair (MTTR)

Answer 12

The time it takes to restore a system