> For the complete documentation index, see [llms.txt](https://server-side.docs.sirdata.net/sirdata-server-side/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://server-side.docs.sirdata.net/sirdata-server-side/f.a.q-server-side/fonctionnement-server-side/dns.md).

# DNS

La seconde entrée NS est une sécurité si la première est en erreur.