Section 28: Planning for the Worst

Question 1

Redundancy

Answer 1

It’s basically having a backup, just in case something goes bad

Question 2

Single Point of Failure

Answer 2

The individual elements, objects, or parts of a system that would cause the whole system to fail if they were to fail

Question 3

Redundant Power Supply

Answer 3

Two or more supplies in a server or computer

Question 4

Surge

Answer 4

An unexpected increase in the amount of voltage provided

Question 5

Spike

Answer 5

A short transient in voltage that can be due to a short circuit, tripped circuit breaker, etc.

Question 6

Sag

Answer 6

An unexpected decrease in the amount of voltage provided

Question 7

Brownout

Answer 7

Occurs when the voltage drops low enough that it typically causes the lights to dim and the computer to shut off

Question 8

Blackout

Answer 8

Occurs when there is a total loss of power for a prolonged period

Question 9

UPS

Answer 9

Combines the functionality of surge protector with that of a battery backup (usually won’t last much more than 15-30 minutes)

Question 10

Backup Generator

Answer 10

An emergency power system used when there is an outage of the regular power

Question 11

Gas generator

Answer 11

Noisy and is the cheapest solution

Question 12

Permanently installed generator

Answer 12

much more expensive, runs on natural gas or diesel fuel

Question 13

Battery inverter generator

Answer 13

super quiet, virtually no user interaction

Question 14

RAID

Answer 14

Allows the combination of multiple physical hard disks into a single logical hard disk drive that is recognized by the operating system

Question 15

RAID 0

Question 16

RAID 1

Answer 16

Provides redundancy by mirroring the data identically on another disk

Question 17

RAID 5

Answer 17

Provides redundancy by striping data and parity data across the disk drives

Question 18

RAID 10

Answer 18

Combination of Raid 1 and 0 (good example of a disaster tolerant raid)

Question 19

Network Redundancy

Answer 19

Internet Connections - don’t just have this stuff going through one NIC or cables

Question 20

Clustering

Answer 20

Two or more servers working together to perform a function

Question 21

Failover Cluster

Answer 21

A secondary server can take over the function when the primary one fails

Question 22

Load-balancing Cluster

Answer 22

Servers are clustered in order to share resources such as CPU, RAM, and hard disks

Question 23

Redundant Site

Answer 23

Another place to work if one of the places you work goes down

Question 24

Hot Site

Answer 24

A near duplicate of the original site of the organization that can be up and running within minutes

Question 25

Warm Site

Answer 25

A site that has computers, phones, and servers but they might require some configuration before users can start working

Question 26

Cold Site

Answer 26

A site that has tables, chairs, bathrooms, and possibly some technical items

Question 27

Kinds of Backups

Answer 27

Full, incremental, differential

Question 28

Full Backup

Answer 28

All of the contents of a drive are backed up

Question 29

Incremental Backup

Answer 29

Only conducts a backup of the contents of a drive that have changes since the last full or incremental backup

Question 30

Differential Backup

Answer 30

Only conducts a backup of the contents of a drive since the last full backup

Question 31

10 Tape Rotation

Answer 31

Each tape is used once per day for two weeks and then the entire set is reused

Question 32

Grandfather-Father-Son Rotation

Answer 32

Three sets of backup tapes are defined as the son (daily), the father (weekly), and the monthly (grandfather)

Question 33

Towers of Hanoi Rotation

Answer 33

three sets of backup tapes (like the grandfather father son) that are rotated in a more complex system

Question 34

Snapshot Backup

Answer 34

Type of backup primarily used to capture the entire operating system image including all applications and data

Question 35

Disaster Recovery Planning

Answer 35

The development of an organized and in depth plan for problems that could affect the access of data or the organization's building

Question 36

Business Impact Analysis

Answer 36

identifies risks and their affect on ongoing operations

Question 37

MTD

Answer 37

Sets the upper limit on the recovery time (maximum tolerable downtime)

Question 38

RPO

Answer 38

How long you can be without your data

Question 39

Mean Time to Repair

Answer 39

Measures the average time to repair something after it breaks