By default, ESX/ESXi provides an extensible multipathing module called the Native Multipathing Plugin (NMP).

Generally, the VMware NMP supports all storage arrays listed on the VMware storage HCL and provides a default path selection algorithm based on the array type. The NMP associates a set of physical paths with a specific storage device, or LUN. The specific details of handling path failover for a given storage array are delegated to a Storage Array Type Plugin (SATP). The specific details for determining which physical path is used to issue an I/O request to a storage device are handled by a Path Selection Plugin (PSP). SATPs and PSPs are sub-plugins within the NMP module.