Which statement concerning the Active/Active failover feature is correct?
A.
Active/Active failover is supported in “multiple mode” configuration only.
B.
Active/Active failover supports site-to-site IPSec VPN stateful failover.
C.
If an active security context within the primary security appliance “fails”, the status of the primary security appliance unit changes to “failed” while the secondary failover security appliance unit transitions to “active.”
D.
ASA Security Appliance failover pair must have either an Unrestricted and UR license or a UR and FO-A/A license to be able to support Active/Active failover.
Explanation:
http://www.cisco.com/en/US/docs/security/asa/asa83/asdm63/configuration_guide/ha_active_active.pdf
Prerequisites for Active/Active Failover
In Active/Active failover, both units must have the following:
The same hardware model
The same number of interfaces
The same types of interfaces
. . . . . . . . . . . . . . . . .
Failover groups can only be added to the system context of devices that are configured for multiple context mode.