Apex domains cannot have CNAME records.
Question and response
Question
dig web-et-solutions.com. NS
Answer
web-et-solutions.com. 1 NS ns1.web-et-solutions.com.
web-et-solutions.com. 1 NS ns2.web-et-solutions.com.
Authority
The response has no authority records.
Additional
ns1.web-et-solutions.com. 1 A 91.151.119.66
ns2.web-et-solutions.com. 1 A 91.151.119.67
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0