Which two of the following statements are true about Cisco IOS IPS functionality?

Which two of the following statements are true about Cisco IOS IPS functionality?

A.
The signatures available are built into the Cisco IOS code.

B.
To update signatures, you need to install a new Cisco IOS image.

C.
To activate new signatures, you can download a new signature definition file from the Cisco website.

D.
Loading and enabling selected IPS signatures is user-configurable.

E.
Cisco IOS Software only provides intrusion detection functionality.

F.
Cisco IOS IPS requires a network module running sensor software to be installed in your router.