Supported NFS protocols and how to identify which protocol is being used

Q. What are the supported version of NFS protocol ? How to identify which being used now ? A. NFSv3 is supported with XenServer 6.1,6.2,6.5 and XenServer version 7 supports NFSv3 and NFSv4.If the underlying storage array does not support NFSv4, NFSv3 will be used to mount the share. In order to...