域名服务英文名称

DomainNameSystem(DNS).Itactsasadirectory,puterscanunderstand.WithoutDNS,ess.

InorderforDNStowork,workofserversisneeded,knownasDomainNameServersorDNSserversforshort.TheseserversholddatabasesofdomainnamesandtheircorrespondingIPaddresses,putersseekingtoconnecttoawebsite.Whenausertypesadomainnameintotheirbrowser,putersendsarequesttoaDNSservertoresolvethenametoitsIPaddress.

DNSserversareidentifiedbyauniqueIPaddress,municate,theyarealsoassigneddomainnames,knownashostnames.Thesehostnamesarethenassociatedwithadomainnamehierarchy,whichcategorizesthembasedontheirlocationandfunctionwithintheDNSsystem.

ThereareafewimportanttermstounderstandwhentalkingaboutDNSservers.ThefirstisauthoritativeDNSserver,whichisresponsibleforprovidingthecorrectIPaddressforaspecificdomainname.NextisrecursiveDNSserver,whichisresponsibleforfindingandretrievingtheIPaddressforadomainnamebyqueryingotherDNSserversuntilithasfoundthecorrectone.

TherearealsodifferenttypesofDNSservers,includingprimaryandsecondaryDNSservers.TheprimaryDNSserverisresponsibleformaintainingthedatabaseofdomainnamesandIPaddresses.ThesecondaryDNSserversarecopiesoftheprimaryserver,usedforredundancyandbackupincasetheprimaryserverfails.

InadditiontoDNSservers,therearealsoDNSresolvers,municatewithDNSserversonbehalfofclientdevices.ThishelpstoreducetheworkloadofDNSserversbyallowingqueriestobecachedandreusedforfuturerequests.

Overall,infrastructure,municationbetweendevicesacrosstheworld.Theirimportancecannotbeoverstated,asawhole.