19-B Flashcards
What is the primary purpose of data backup?
To store copies of critical data for safekeeping and protect against data loss due to disasters
What does data recovery enable you to do?
Restore user access to lost or corrupt data via the backup
What are two main factors that govern backup operations?
- Frequency
- Retention
How does backup frequency affect backup operations?
It reflects how much lost work can be tolerated
What is the significance of short-term retention in backup procedures?
Important for version control and recovering from malware infection
What are the three main types of backups in a backup chain?
- Full only
- Full with incremental
- Full with differential
What does a ‘Full only’ backup entail?
Produces a file that contains all the data from the source
What is the recovery complexity of a ‘Full with incremental’ backup?
High, as it can involve two or more jobs
What is a synthetic backup?
An option for creating full backups with lower data transfer requirements, assembled from other backup jobs
What does the 3-2-1 backup rule state?
Have three copies of your data across two media types, with one copy held offline and off site
What is the advantage of keeping some backup media offline?
Better security against threats like crypto-ransomware
What should you do to test a backup scheme?
Try restoring some of the backed-up data into a test directory
What is the importance of configuring backup software to verify after it writes?
To ensure each job is a valid copy of the source data
What are the risks associated with on-site backup storage?
If a disaster strikes, both production and backup copies of the data may be lost
Fill in the blank: A backup rotation scheme allows some media to be reused once the _______ period has expired.
retention
True or False: Linux uses an archive attribute to determine the backup status.
False
What is the purpose of the Backup and Restore Center control panel tool in Windows?
Provides an alternative backup manager and can make image backups of the entire operating system
What is an alternative method for restoring files in Windows besides using the Previous Versions tab?
Using the File History applet
What is a key consideration when planning backup frequency and retention?
The capacity of the backup media and the time it takes to complete a backup job
What is the potential downside of using cloud-based backup services?
Substantial risks from failure of the cloud provider
