Availability means systems are accessible when needed. If your network goes down, business stops. Customers leave. Revenue disappears.
You protect availability through:
Redundancy. Multiple servers, links, and power supplies. No single point of failure.
Load balancing. Traffic distributes across multiple systems.
DDoS protection. Filtering and rate limiting stop attackers from flooding your network.
Backup and recovery. Restore from recent backups quickly.
For many businesses, % uptime means hours of downtime per year.