Apex domains cannot have CNAME records.
Question and response
Question
dig exifnet.hu. NS
Answer
exifnet.hu. 5 NS ns1.exifnet.hu.
exifnet.hu. 5 NS ns2.2connect.hu.
Authority
The response has no authority records.
Additional
ns1.exifnet.hu. 5 A 193.110.56.1
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0