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For example, a company has one domain name and three identical home pages residing on three servers with three different IP addresses.When one user accesses the home page it will be sent to the first IP address.It makes no sense to edit these databases on the secondary name servers, although they are saved on the local server disk because they will be rewritten during further copying. This type of name server is not published anywhere.It is only known to the servers that have its IP address statically listed in their configuration. It acquires the data for the zone with the help of a zone transfer. Stealth servers can be used as a local backup if the local servers are unavailable. A 32-bit number indicating the time the particular RR can be kept valid in a server cache.A dynamic DNS service provider uses a special program that runs on the user's computer, contacting the DNS service each time the IP address provided by the ISP changes and subsequently updating the DNS database to reflect the change in IP address.An important part of managing server configuration and infrastructure includes maintaining an easy way to look up network interfaces and IP addresses by name, by setting up a proper Domain Name System (DNS).
If you are running rndc on the name server, connections on this TCP port from localhost should be allowed.The fourth user, therefore, will be sent to the first IP address, and so forth.A name server keeps information for the translation of domain names to IP addresses and IP addresses to domain names.When this time expires, the record has to be considered invalid.The value 0 keeps nonauthoritative servers from saving the RR to their cache memory.
The name server is a program that performs the translation at the request of a resolver or another name server.