Les serveurs racine sont gérés par douze organisations différentes : deux sont européennes, une japonaise et les neuf autres sont américaines. Sept de ces serveurs sont en réalité distribués dans le monde grâce à la method anycast et neuf disposent d'une adresse IPv6[21].
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The delegating name server presents this glue in the check here shape of records in the extra section with the DNS response, and offers the delegation during the authority part with the response. A glue document is a mix of the name server and IP deal with.
in almost any party, the name server As a result queried will follow the procedure outlined earlier mentioned, until eventually it either properly finds a consequence or won't. It then returns its effects into the DNS resolver; assuming it's located a result, the resolver duly caches that final result for long run use, and hands the result back to your computer software which initiated the request.
reader is familiar with the principles reviewed With this memo. A subset of DNS features and knowledge varieties represent an Formal
In case of a caching DNS resolver, the non-recursive question of its area DNS cache provides a result and lessens the load on upstream DNS servers by caching DNS resource records for a timeframe immediately after an First reaction from upstream DNS servers.
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Resource information of precisely the same style are called a useful resource record set (RRset), acquiring no Particular purchasing. DNS resolvers return the whole set on question, but servers could apply round-robin purchasing to realize load balancing. In distinction, the Domain Name program protection Extensions (DNSSEC) work on the entire set of resource history in canonical buy.
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L'interception peut se concrétiser de différentes manières, notamment via une attaque de form « guy in the center », de l'écoute des données transférées et de l'envoi de réponse falsifiée (voir paragraphe ci-dessous).
NAME may be the thoroughly experienced domain name of your node inside the tree.[clarification desired] to the wire, the name may very well be shortened utilizing label compression where ends of domain names described before inside the packet is often substituted to the close of the present domain name.
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RDATA is data of variety-unique relevance, such as the IP handle for handle documents, or maybe the priority and hostname for MX records. famous report varieties could use label compression while in the RDATA discipline, but "unidentified" document varieties must not (RFC 3597).