[clue-tech] DNS

[Roy]

dns will round robin through the servers- so on a no response it may retry but if it does get a response but bad data - it will cache that and stop.
which is why all authoritative NS need to be up to date and synced.



Chris Ernst <penguin-guy at comcast.net> wrote:

>It's up to the client.  Typically, if the initial request fails and
>there is another NS record, it will just try the next one.
>
>	- Chris
>
>On 11/18/2010 12:56 PM, David L. Willson wrote:
>> If a domain has a couple NS records setup at the registrar, what happens
>> if one of name-servers is down? Do lookups fail back to the client or
>> fail gracefully to the other NS with no notice to the client?
>> 
>> What if there are more than two name-servers? Are they all tried before
>> a failure is reported, or just a certain number?
>> 
>> What if the name-server is up, but there's another sort of failure, like
>> "no such domain" or something like that?
>> 
>> I am willing and able to look this up myself, or trace it out myself,
>> but I'm short of time, so I thought I'd check if someone knew off the
>> top of their head, and wanted to show off a bit.
>> 
>> David L. Willson
>> Trainer, Engineer, Enthusiast
>> MCT MCSE Network+ A+ Linux+ LPIC-1 NovellCLA UbuntuCP
>> tel://720.333.LANS
>> Freeing the world from the tyranny (or whatevery) of Microsofty-ness
>> 
>> 
>> 
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>
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