Question and response
Question
dig alibabadns.com. NS
Answer
alibabadns.com. 86400 NS ns2.alibabadns.com.
alibabadns.com. 86400 NS ns1.alibabadns.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0