Which statement is correct when upgrading vShield Data Security to NSX Data Security ?
A.
NSX Data Security does not support a direct upgrade.
B.
NSX Controller must be deployed before the upgrade.
C.
The vCloud Network and Security Virtual Wires must have been upgraded.
D.
vCould Network and Security must be at least version 5.1 before starting the upgrade.
A is correct:
Prerequisites
■ You have upgraded to vCenter Server 5.5.
■ vShield Data Security has been uninstalled. For information on uninstalling the current Data Security software, see the documentation for that version.
■ vShield Edge instances prior to version 5.5, if any, have been upgraded to version vShield 5.5.
https://pubs.vmware.com/NSX-6/index.jsp?topic=%2Fcom.vmware.nsx.install.doc%2FGUID-9E0607D9-05AC-4C4F-87F6-C94C4919DECA.html