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Update How to set up a primary DNS server using CentOS.md

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joeren 2014-05-19 11:45:01 +08:00
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How to set up a primary DNS server using CentOS How to set up a primary DNS server using CentOS
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Any operational domain has at least two DNS servers, one being called a primary name server (ns1), and the other a secondary name server (ns2). These servers are typically operated for DNS failover: If one server goes down, the other server becomes an active DNS server. More sophisticated failover mechanisms involving load balancers, firewalls and clusters are also possible. Any operational domain has at least two DNS servers, one being called a primary name server (ns1), and the other a secondary name server (ns2). These servers are typically operated for DNS failover: If one server goes down, the other server becomes an active DNS server. More sophisticated failover mechanisms involving load balancers, firewalls and clusters are also possible.
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[1]:http://xmodulo.com/2014/04/close-open-dns-resolver.html [1]:http://xmodulo.com/2014/04/close-open-dns-resolver.html
[2]:http://xmodulo.com/2014/04/secondary-dns-server-centos.html [2]:http://xmodulo.com/2014/04/secondary-dns-server-centos.html
[3]:http://xmodulo.com/2014/04/close-open-dns-resolver.html [3]:http://xmodulo.com/2014/04/close-open-dns-resolver.html