What is required to deploy an active/active cluster?

A.
dedicated interfaces for state and configuration synchronization and management modules in at
least one gateway

B.
separate VIP configurations for the external interface facing incoming traffic and the VIP for
synchronization

C.
each node must have a dedicated default route through the gateway that connects to all other
Junos Pulse Gateways

D.
an external load balancer or DNS mechanism to distribute the traffic to each cluster member