A technician sets up a network with multiple WAN connections, backup power sources, multiple firewalls, and a mesh configuration for network switching. All of the software and hardware has fault…

Load balancing distributes traffic or workloads across resources to improve performance - it is one component that can contribute to HA but does not describe the overall redundancy architecture by itself.

High availability (HA) is achieved by eliminating single points of failure through redundant WAN links, power sources, firewalls, and mesh switching topologies, combined with automated fault detection and failover. The goal is to keep systems operational with minimal or no downtime, which is precisely what the described network design accomplishes.

Caching engines store data locally to improve response times and reduce upstream load - they are not a fault-tolerant or redundancy strategy.

Quality of Service prioritizes certain traffic types to ensure performance for critical applications - it does not address hardware redundancy or fault tolerance.