Which two statements about IPS signatures are true? (Choose two.) 

Answer options:

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.

BE