Which statement about the FortiGuard services for the FortiGate is true?

A. Antivirus signatures are downloaded locally on the FortiGate.

B. FortiGate downloads IPS updates using UDP port 53 or 8888.

C. FortiAnalyzer can be configured as a local FDN to provide antivirus and IPS updates.

D. The web filtering database is downloaded locally on the FortiGate.