Final answer:
Enabling auto-discover-forwarders on VPN hubs denotes the automatic discovery of the most efficient traffic forwarding paths to improve network performance and responsiveness.
Step-by-step explanation:
When auto-discover-forwarder is enabled on hubs in a VPN setup, it signifies Enables automatic forwarder discovery. This feature is typically used in the context of a software-defined wide area network (SD-WAN) or similar technologies where the VPN hub nodes automatically discover the most efficient paths or forwarders to route traffic between different network endpoints. By enabling auto-discover-forwarder, the manual configuration of static routes is reduced, and the network can quickly adapt to changes in topology, ensuring improved performance and resilience.