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Merge pull request #997 from GOLinux/patch-2

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Translating:How to set up a primary DNS server using CentOS.md
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Xingyu.Wang 2014-05-19 11:56:35 +08:00
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sources/tech/How to set up a primary DNS server using CentOS.md
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Translating by GOLinux ...
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.
@ -349,4 +351,4 @@ via: http://xmodulo.com/2014/04/primary-dns-server-using-centos.html
[1]:http://xmodulo.com/2014/04/close-open-dns-resolver.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