Which two statements about IPS signatures are true? (Choose two.)
A.
All of the built-in signatures are enabled by default.
B.
Tuned signatures are built-in signatures whose parameters are adjusted.
C.
Once the signature is removed from the sensing engine it cannot be restored
D.
It is recommended not to retire a signature that is not being used because then it
cannot be restored.
E.
It is possible to define custom signatures.