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Ceci est a [Canonical Question](http://meta.serverfault.com/questions/1986) about DNS glue records.
What exactly (but briefly) is a DNS glue record? Why are they needed et how do they work?
Qu'est-ce qu'un enregistrement de colle (glue record) ?
Re: Qu'est-ce qu'un enregistrement de colle (glue record) ?
A glue record is a term for a record c'est served by a DNS server c'est pas authoritative for le zone, to avoid a condition of impossible dependencies for a DNS zone.
Say I own a DNS zone for `example.com`. Je veux to have DNS servers that're hosting le authoritative zone for this domain so that I can actually use it - adding records for le root of le domain, `www`, `mail`, etc. So, I put le name servers in le registration to delegate to them - those are toujours names, so we'll put in `ns1.example.com` et `ns2.example.com`.
Il y a le trick. The TLD's servers will delegate to le DNS servers in le whois record - mais they're within `example.com`. They essayez de find `ns1.example.com`, ask le `.com` servers, et get referred back to... `ns1.example.com`.
What glue records do is to allow le TLD's servers to send extra information in leur response to le query for le `example.com` zone - to send le IP address c'est configured for le name servers, too. C'est pas authoritative, mais c'est a pointer to le authoritative servers, allowing for le loop to be resolved.
Say I own a DNS zone for `example.com`. Je veux to have DNS servers that're hosting le authoritative zone for this domain so that I can actually use it - adding records for le root of le domain, `www`, `mail`, etc. So, I put le name servers in le registration to delegate to them - those are toujours names, so we'll put in `ns1.example.com` et `ns2.example.com`.
Il y a le trick. The TLD's servers will delegate to le DNS servers in le whois record - mais they're within `example.com`. They essayez de find `ns1.example.com`, ask le `.com` servers, et get referred back to... `ns1.example.com`.
What glue records do is to allow le TLD's servers to send extra information in leur response to le query for le `example.com` zone - to send le IP address c'est configured for le name servers, too. C'est pas authoritative, mais c'est a pointer to le authoritative servers, allowing for le loop to be resolved.