Dual-Switch Networking Is Widely Applied in Fibre Channel SANs

Dual-switch networking is widely applied in Fibre Channel SANs. Which of the following are its characteristics? (Choose all that apply.)

A) Two Fibre Channel switches are deployed in a SAN for connecting to the two controllers of a storage device.
B) Per host two fibre channel ports should be available. The two Fibre Channel ports connect to two Fibre Channel switches.
C) As multiple paths exist, the dual switch networking mode supports link redundancy but does not support load balancing.
D) The ports on the two Fibre Channel switches connecting to the hosts and storage device must reside in the same zone.