Refer to the exhibit. Why is the Total Active Signatures count zero?
A.
IPS is in fail-closed mode.
B.
IPS is in fail-open mode.
C.
The 128MB.sdf file in flash is corrupted.
D.
IPS has not been enabled on an interface yet.
E.
The flash:/128MB.sdf needs to be merged with the built-in signatures first.