When enabling the Cisco IOS IPS feature, which step should you perform to prevent rogue
signature updates from being installed on the router?

A.
configure authentication and authorization for maintaining signature updates

B.
install a known RSA public key that correlates to a private key used by Cisco

C.
manually import signature updates from Cisco to a secure server, and then transfer files from
the secure server to the router

D.
use the SDEE protocol for all signature updates from a known secure management station