Is it possible to specify NS for a third level domain?

Question

Domain Name System

For example, what would a separate NS work on site2.site.com, and site.com would hold another NS

Answer 1

yes, it is possible. In the site.com zone, you must add
site2 IN NS адрес.сервера.зоны.site2.
if the address of the NS server itself is in the site2 zone, you must add an A-record for it in the site.com zone