What feature is enabled to prevent a single point of failure in a network using FortiAnalyzer HA?

The feature that is enabled to prevent a single point of failure in a network using FortiAnalyzer HA (High Availability) is virtual routers. In a High Availability configuration, virtual routers facilitate seamless failover between devices. They allow multiple FortiAnalyzer units to operate as a single logical unit, ensuring that if one device fails, the others can continue to handle traffic without interruption. This redundancy is essential for maintaining network uptime and reliability, thus effectively addressing potential single points of failure in the network architecture.

Other options, while important for network design, do not specifically address the HA capability in FortiAnalyzer. Load balancing refers to distributing workloads across multiple resources but does not inherently provide redundancy. Network segmentation involves dividing a network into smaller parts for security and management, but it doesn’t prevent failure from a single device. Redundant links can enhance network reliability but are not an HA-specific feature tied to FortiAnalyzer's function in providing failover capabilities.