Which of the following are valid FortiGate device interface methods for handling DNS requests? (Select all that apply.)

Forward-only mode means the FortiGate forwards all DNS queries to configured external DNS servers without attempting to resolve them itself.

Non-recursive queries are handled by returning an answer from cache or authoritative zone, without querying other servers.

Recursive mode allows the FortiGate to fully resolve DNS requests by querying other DNS servers until it finds the authoritative answer, then returning it to the client.

Iterative queries are typically part of a DNS server's internal recursive process to find an answer, rather than a specific interface method configuration for clients on a FortiGate.

Conditional-forward is a DNS forwarding strategy but is not listed as a primary DNS interface method type on a FortiGate in the same category as recursive/non-recursive/forward-only.