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
Answer: B