DNS:An authoritative name server is a name server that gives answers in response to questions asked about names in a zones. An authoritative-only name server only returns answers to queries about domain names that have been specifically configured by the administrator. Name servers can also be configured to give authoritative answers to queries in some zones, while acting as a caching name server for all other zones.An authoritative name server can either be a master server or a slave server. A master server for a zone is the server that stores the definitive versions of all records in that zone. A slave server for a zone uses an automatic updating mechanism to maintain an identical copy of the master records. Examples of such mechanisms include DNS zone transfers and file transfer protocols. DNS provides a mechanism whereby the master for a zone can notify all the known slaves for that zone when the contents of the zone have changed. The contents of a zone are either manually configured by an administrator, or managed using Dynamic DNS.Every domain name appears in a zone served by one or more authoritative name servers. The fully qualified domain names of the authoritative name servers of a zone are listed in the NS records of that zone. If the server for a zone is not also authoritative for its parent zone, the server for the parent zone must be configured with a delegation for the zone.
Appavin Manaivi Tamil Kama Kathaikal PDF StoryDNS:An authoritative name server is a name server that gives answers in response to questions asked about names in a zones. An authoritative-only name server only returns answers to queries about domain names that have been specifically configured by the administrator. Name servers can also be configured to give authoritative answers to queries in some zones, while acting as a caching name server for all other zones.An authoritative name server can either be a master server or a slave server. A master server for a zone is the server that stores the definitive versions of all records in that zone. A slave server for a zone uses an automatic updating mechanism to maintain an identical copy of the master records. Examples of such mechanisms include DNS zone transfers and file transfer protocols. DNS provides a mechanism whereby the master for a zone can notify all the known slaves for that zone when the contents of the zone have changed. The contents of a zone are either manually configured by an administrator, or managed using Dynamic DNS.Every domain name appears in a zone served by one or more authoritative name servers. The fully qualified domain names of the authoritative name servers of a zone are listed in the NS records of that zone. If the server for a zone is not also authoritative for its parent zone, the server for the parent zone must be configured with a delegation for the zone.
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