Is it correct that a user with a zone delegated request an A RRset ? Example movistar.com.ec. 172800 IN NS dns1uio.cyberweb.net.ec. movistar.com.ec. 172800 IN NS dns2gye.cyberweb.net.ec. And request: dnsmoviles.movistar.com.ec. 172800 IN A 200.24.209.126 because secundaries servers do not transfer this A RRset, in what RFC can read it ?