An administrator wants to configure a FortiGate as a DNS server. The FortiGate must use its DNS database first, and then relay all irresolvable queries to an external DNS server. Which of the following DNS method must you use?

An administrator wants to configure a FortiGate as a DNS server. The FortiGate must use its DNS database first, and then relay all irresolvable queries to an external DNS server. Which of the following DNS method must you use?
A . Non-recursive
B . Recursive
C . Forward to primary and secondary DNS
D . Forward to system DNS

Answer: B