Cloud Concepts

The ability of a system to remain operational and accessible with minimal downtime, often backed by an SLA.

Through Service Level Agreements (SLAs) that specify guaranteed uptime percentages.

They are physically separate datacenters within a region, so a failure in one zone does not take down resources in another.

If an entire region fails, the workload can continue running in another geographic region.

Redundancy duplicates critical components so a backup can take over on failure, which is how high availability is achieved.