The preferred path to your VMware ESX host failed. Which native multi-pathing policy will
revert to the preferred path when it is restored?

A.
Fixed only

B.
MRU only

C.
Round-robin

D.
Bath Fixed and MRU

Explanation:
Native ESX/ESXi Multipath is managed via the configuration of a failover policy. Policy
options are:
• MRU (Most Recently Used) – uses last active path, and does not fail back when a path is
restored
• Fixed (Preferred path) – reverts back to preferred path when it is restored to service
• Round Robin – rotates the path selection between all available paths and enables basic
load balancing across the paths.
This algorithm is not adaptive, so it will flip from one channel to the other with no regard for
the work load unlike PowerPath, nor is it responsive to queue depth.
NotE. Prior to vSphere, there was no way to load balance a LUN indigenously and
customers needed to statically distribute LUNs across paths.