Section 14.128 Data Backups

Question 1

Data Backup

Answer 1

Creating duplicate copies of digital information to protect against data loss, corruption, or unavailability

■ Safeguards data from accidental deletion or system failures

Question 2

1 Onsite Backup

Answer 2

Storing data copies in the same location as the original data

Question 3

2 Offsite Backup

Answer 3

Storing data copies in a geographically separate location

Protect against physical disaters

Question 4

Onsite and Offsite Backups Importance

Answer 4

● Onsite backups are convenient but vulnerable to disasters

● Offsite backups protect against physical disasters

Question 5

Backup Frequency

Answer 5

Determining factor of backup frequency is the organisations RPO

● Recovery Point Objective (RPO):
○ Ensures that the backup plan will maintain the amount of data required to keep any data loss under the organisation’s RPO threshold

Question 6

Backup Frequency Considerations

Answer 6

● Data change rate
● Resource allocation
● Organisational needs

Consider the RPO organisation to confirm that the backup plan preserves the necessary data amount

Question 7

3 Encryption

Answer 7

Fundamental safeguard that protects the backup data from unauthorised access
and potential breaches

● Data-at-rest Encryption
○ Encrypting data as it is written to storage

● Data-in-transit Encryption
○ Protecting data during transmission

Importance: Safeguarding backup data from unauthorised access and breaches

Question 8

4 Snapshots

Answer 8

Point-in-time copies capturing a consistent state

■ Records only changes since the previous snapshot, reducing storage requirements

Use cases: Valuable for systems where data consistency is critical, like databases and
file servers

Question 9

5 Data Recovery

Answer 9

Several key steps in the data recovery process

● Selection of the right backup
● Initiating the recovery process
● Data validation
● Testing and validation
● Documentation and reporting
● Notification

Importance: Regaining access to data in case of loss or system failure; a well-defined and tested recovery plan is essential

Question 10

6 Replication

Answer 10

Real-time or near-real-time data copying to maintain data continuity

Benefits:
● Ensures seamless data continuity
● Suitable for high-availability environments

Question 11

7 Journaling

Answer 11

Maintaining a detailed record of data changes over time

Benefits:
● Enables granular data recovery
● Maintains an audit trail
● Ensures data integrity and compliance

Considerations: Data tracking granularity, size, retention policies, and security