Which of the following troubleshooting steps is applicable when investigating antivirus and IPS update issues on FortiGate?

Which of the following troubleshooting steps is applicable when investigating antivirus and IPS update issues on FortiGate?
A . Use the alternate service port 8888.
B . Validate DNS resolution for update.fortiguard.net.
C . Verify outbound ICMP connectivity.
D . Use the diagnose debug rating command to check active servers.

Answer: B