When configuring the Auto Update feature for Cisco IOS IPS, what is a recommended best practice?
A. Synchronize the router’s clock to the PC before configuring Auto Update.
B. Clear the router’s flash of unused signature files.
C. Enable anonymous TFTP downloads from Cisco.com and specify the download frequency.
D. Create the appropriate directory on the router’s flash memory to store the downloaded signature files.
E. Download the realm-cisco.pub.key file and update the public key stored on the router.
For more, see https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/sec_data_ios_ips/configuration/15-mt/sec-data-ios-ips-15-mt-book/sec-ips5-sig-fs-ue.html