Backup Flashcards
(12 cards)
What is a backup in networking and computing?
A backup is a copy of data stored separately from the original source to protect against data loss due to hardware failure, cyberattacks, accidental deletion, or disasters.
Why are backups important in networked systems?
They ensure data can be recovered in case of corruption or loss, helping maintain business continuity and protecting critical information.
What are the main types of backups?
- Full backup
- Incremental backup
- Differential backup
What is a full backup?
A full backup makes a complete copy of all data, which takes longer and requires more storage but is easy to restore from.
What is an incremental backup?
An incremental backup only saves changes made since the last backup (full or incremental), saving time and storage but requiring multiple files for full recovery.
What is a differential backup?
A differential backup saves changes made since the last full backup. It’s faster than a full backup but larger than incremental over time.
What is the 3-2-1 backup rule?
Keep 3 copies of your data: 2 on different storage devices and 1 off-site (or cloud) to ensure resilience against failure or disasters.
What are common backup storage options?
Options include external hard drives, network-attached storage (NAS), cloud storage (e.g., Google Drive, AWS), and backup servers.
What is an automated backup system?
It’s a system that schedules and performs backups automatically without user intervention, reducing the risk of missed backups.
How often should backups be performed?
The frequency depends on data sensitivity, but critical systems may require daily or even real-time backups, while others might be weekly or monthly.
What is disaster recovery in relation to backup?
Disaster recovery is the process of restoring data and systems from backups after a major incident such as hardware failure, cyberattack, or natural disaster.
