Which of the following server clusters offers increased availability, performance, and scalability?

"Passive/active" is not a standard or commonly recognized server cluster configuration term.

An active/passive cluster has only one node actively processing workloads while the other remains idle, providing high availability through failover but not increased performance or scalability from simultaneous operation.

"Passive/passive" is not a standard cluster configuration and would imply that no services are running or available.

In an active/active cluster, all nodes are actively processing workloads and requests concurrently, distributing the load across multiple servers. This parallel processing inherently boosts overall performance, enhances scalability by allowing more nodes to share the workload, and improves availability since any active node can take over tasks if another fails.