In short
Fault tolerance is a system's ability to keep operating when a component fails, achieved through redundancy such as spare power supplies, mirrored disks, duplicate servers and alternative network paths.
Key takeaways
- Removing single points of failure is the goal.
- Failover automatically switches to the backup component.
- It reduces downtime but doesn't replace backups, which protect against data loss and corruption.
Where it's tested
ISC: Incident Response & Monitoring — study notes, a five-minute revision sheet and practice questions.
Practise: 3 questions
Question 1 of 3 · 0 answered
A company can tolerate losing at most 15 minutes of transaction data in a disaster. Which metric does this define, and what does it drive?