Which two components are part of storage I/O multipathing on ESXi? (Choose two.)

VASA (vSphere APIs for Storage Awareness) is a storage policy and capability reporting framework that allows arrays to advertise features to vCenter Server - it is not part of the host-level multipathing stack.

PSP (Path Selection Plugin) is an NMP sub-component that determines which active physical path is chosen for each I/O operation, implementing policies such as Most Recently Used, Fixed, or Round Robin.

VAAO is not a defined VMware storage component - the related acronym is VAAI (vSphere APIs for Array Integration), which offloads specific storage operations to hardware but is separate from the multipathing framework.

SATP (Storage Array Type Plugin) is an NMP sub-component that handles array-specific behavior including path state monitoring, failover detection, and issuing vendor-specific commands to a given storage array type.