Question and response
Question
dig ns1.yflnet.com. DNSKEY
Answer
ns1.yflnet.com. 5 CNAME yflnet.com.
Authority
yflnet.com. 3600 SOA ns-355.awsdns-44.com. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0