The best Side of cubox
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La déclaration inverse est importante sur les adresses IP publiques Net puisque l'absence d'une réOption inverse est considérée comme une erreur opérationnelle (RFC 1912[18]) qui peut entraîner le refus d'accès à un provider.
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Authority around the new zone is claimed to be delegated to a designated name server. The dad or mum zone ceases to generally be authoritative for the new zone.[25]
In case the name specified within the delegation is often a subdomain with the domain for which the delegation is currently being presented, You will find there's circular dependency.
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This TTL is decided by the administrator from the authoritative DNS server and may range from a number of seconds to many times or even weeks.[33]
Certaines personnes[Qui ?] disent que cela aurait un intérêt majeur mais n'est que très rarement utilisé sur le monde Web.
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Les paquets des serveurs DNS étant faiblement sécurisés, authentifiés par un numéro de requête, il est attainable de fabriquer de fake paquets. Par exemple, un utilisateur qui souhaite accéder au site fait une demande au web page DNS.
Cette architecture garantit au réseau Web une certaine continuité dans la réAnswer des noms. Quand un serveur DNS tombe en panne, le bon fonctionnement de la résolution de nom n'est pas remis en cause dans la mesure où des serveurs secondaires sont disponibles.
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In practice caching is used in DNS servers to off-load the root servers, and Subsequently, root name servers actually are involved in only a relatively little portion of all requests.
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