are their really 13 dns root servers ? what this means that all the dns requests from the whole world are handled by only 13 d

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tysonkiblader

tysonkiblader

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are their really 13 dns root servers ? what this means that all the dns requests from the whole world are handled by only 13 dns root servers ?
 
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Murissokah
Not all DNS request have to go through a root server. Most of the traffic is handled by lower level DNS servers. For instance, if you need to resolve google.com, there will be lots of DNS servers between you and the root DNS server which already have that information cached.

Each server is not a single physical machine, they are high-availability cluster, so that one host going down means nothing at all.
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Murissokah

Murissokah

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Not all DNS request have to go through a root server. Most of the traffic is handled by lower level DNS servers. For instance, if you need to resolve google.com, there will be lots of DNS servers between you and the root DNS server which already have that information cached.

Each server is not a single physical machine, they are high-availability cluster, so that one host going down means nothing at all.
 
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