Question and response
Question
dig ns1.udnemy.com. NS
Answer
ns1.udnemy.com. 1 CNAME udnemy.com.
udnemy.com. 1 NS ns2.udnemy.com.
udnemy.com. 1 NS ns3.udnemy.com.
Authority
The response has no authority records.
Additional
ns2.udnemy.com. 1 A 81.28.99.10
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0