Which one of the following processes is involved in updating IPS from FortiGuard?

Which one of the following processes is involved in updating IPS from FortiGuard?
A . FortiGate IPS update requests are sent using UDP port 443.
B . Protocol decoder update requests are sent to service.fortiguard.net.
C . IPS signature update requests are sent to update.fortiguard.net.
D . IPS engine updates can only be obtained using push updates.

Answer: C

Explanation:

https://help.fortinet.com/fos50hlp/54/Content/FortiOS/fortigate-ports-and-protocols-54/07-FortiGuard.htm