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dig_server | **Optional.** The DNS server to query. Defaults to "127.0.0.1".
dig_port | **Optional.** Port number (default: 53).
-dig_lookup | **Optional.** The address that should be looked up.
+dig_lookup | **Required.** The address that should be looked up.
dig_record_type | **Optional.** Record type to lookup (default: A).
dig_expected_address | **Optional.** An address expected to be in the answer section. If not set, uses whatever was in -l.
dig_arguments | **Optional.** Pass STRING as argument(s) to dig.