1.7 Security Issues

Question 1

Explain why archived data should be indexed

Answer 1

Easier to retrieve data eg from 40 years ago

Question 2

Describe advantages that archiving offers an organisation which stores large amounts of data

Answer 2

Archived data is inactive so storing it on other media improves the performance of active data

Question 3

Explain the reasons for archiving data

Answer 3

Legal
Historical
Meet industry standards

Question 4

An organisation has set procedures of data backup and recovery.
ExplAin the advantages that this offers the organisation

Answer 4

Regular backup and in the event of a disaster the organisation will be prepared

Question 5

Compare and contrast differential and incremental backups

Answer 5

Incremental backups data from the last backup either full or differential
Differential will ONLY back up from last full back up

Question 6

Describe what happens during backup when an organisation uses a combination of full and differential backups

Answer 6

Full backup and I’ll occur first and then after differential backups will occur and back up ONLY DATA THAT HAS CHANGED SINCE THE LAST FULL BACKUP

Question 7

Scenario given- explain the advantage of using full backup

Answer 7

All data is backed up at once

files can be restored quickly and easily as complete files copied from backup.

Less complex.

Less risk of data not being restored in the correct order.

Question 8

Explain the disadvantages of full backup

Answer 8

Files that haven’t changed may create redundancy (be backed up unnecessarily as they have already been backed up- this takes more space
Takes longer
And security concern over all data being stored in one place.

Question 9

Explain the purpose of a disaster recovery plan

Answer 9

A document which details the procedures associated with the recovery and protection of an IT system.
Purpose is to enable the organisations vital technology to continue to work in the event of an emergency.

Question 10

Describe the contents of a disaster recovery plan

Answer 10

Potential causes of disaster, fire, theft
Staff responsibility
Plan of action
Testing recovery plan

Question 11

Archived data

Answer 11

Data not needed on a day to day basis

Focuses on retaining a single provably correct copy of non changing data.

Data could be compressed storied on less expensive media.

Still needs to be accessible for user.

Question 12

Why is data backed up

Answer 12

So it it protected

Involved creating a copy of both data and SW

If this occurred then backup is restored.

Question 13

Advantages of differential backup

Answer 13

Faster than incremental as only uses last full backup and last differential backup.

Only copies data that have been updated so backup is faster than full.

Takes up less storage than full.

Question 14

Disadvantages of differential backup

Answer 14

Requires more storage space than incremental.

Longer time needed to restore files than with incremental backup as all changes since the last full backup will be copied.

Question 15

Advantages of incremental backup

Answer 15

Faster backup time as only amended files need to be copied.

Less storage medium required to store incremental file as only copy files where changes occurred.

Question 16

Incremental backup disadvantages

Answer 16

Recovery process can take longer as all previous incremental backups are required in the process.

Problems may occur if any incremental backups have corrupted, the entire file will be unrecoverable.

Question 17

Why business needs disaster recovery plan

Answer 17

Must be able to operate as normal

Key data
Processes
Personnel
Risks identified

Backup and recovery method described

Alternative location.