The official VCP65-DCV Exam Preparation Guide covers a lot of security topics, but the vSphere 6.5 Storage guide is definitely more rich, with more content.
For example, the following aspects are not considered in the preparation guide:
- N-Port ID Virtualization (https://docs.vmware.com/en/VMware-vSphere/6.5/com.vmware.vsphere.storage.doc/GUID-E05D5E0A-89A3-4948-8F61-F86A84128446.html)
- Configuring Fibre Channel over Ethernet (https://docs.vmware.com/en/VMware-vSphere/6.5/com.vmware.vsphere.storage.doc/GUID-A9503ED6-2622-4278-890E-B869C3971A9F.html)
- Best Practices for Fibre Channel Storage (https://docs.vmware.com/en/VMware-vSphere/6.5/com.vmware.vsphere.storage.doc/GUID-0C1B4D0A-F993-4F8A-8255-EE156A85C904.html)
- Setting LUN Allocations for iSCSI (https://docs.vmware.com/en/VMware-vSphere/6.5/com.vmware.vsphere.storage.doc/GUID-62902F8C-0D28-46E3-AFFA-5E52C49B15A4...