When it comes to creating pooled WWN objects， it is important to understand that a Cisco UCS WWN pool can include only WWNNs or WWPNs from which value of ranges？（）

A. NPIV provides a means to assign multiple Fibre Channel IDs to a single N-port.
B. NPIV can be enabled on a per-VSAN basis.
C. NPIV requires a "write erase" and then reload the switch in order to come up into NPIV mode. 
D. NPIV is a Cisco proprietary feature and as such works only between two Cisco switches.
E. NPIV must not be enabled on a switch that is also running N-port virtualization.

A. 2
B. 3
C. 4
D. 6
E. 12

A. After enabling NPIV， switch interfaces can only be placed into NP， F， or SD modes of operation.
B. NPV devices log in to NPIV devices.
C. NPIV requires the Enterprise License Package.
D. NPIV is supported on the Cisco MDS， N7K， and N5K families of switches.
E. A director class switch should not be placed into NPIV mode.