Which deployment method reduces inter-PSN communications and the need to replicate endpoint changes?

The method that reduces inter-PSN communications and mitigates the need to replicate endpoint changes is node groups. This approach segments the workload and effectively distributes endpoint management across a defined group of Policy Service Nodes (PSNs). By organizing PSNs into node groups, the overall communication between them decreases, as the node group can manage specific parts of the endpoint data locally rather than relying heavily on constant inter-node communication for all updates and changes.

When utilizing node groups, each PSN can maintain its own localized view of endpoints within the group, leading to more efficient processing and a more streamlined operation. This method not only alleviates the load on network resources but also enhances performance since not all PSNs need to be synchronized for every endpoint change, allowing for quicker responses to authentication and authorization requests within defined groups.

This efficiency is particularly important in environments with a large number of endpoints, as it enables better scalability and responsiveness without overburdening the PSNs with unnecessary replication tasks.