Question and response
Question
dig aliyun.com. NS
Answer
aliyun.com. 172800 NS ns5.aliyun.com.
aliyun.com. 172800 NS ns4.aliyun.com.
aliyun.com. 172800 NS ns3.aliyun.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0