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Re: [Asrg] RFC 6471 and "listing the Internet" as a punishment

Brendan Hide <brendan@swiftspirit.co.za> Thu, 26 January 2012 00:02 UTC

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Date: Thu, 26 Jan 2012 02:01:46 +0200
From: Brendan Hide <brendan@swiftspirit.co.za>
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Subject: Re: [Asrg] RFC 6471 and "listing the Internet" as a punishment
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On 01/26/12 01:26, Paul Smith wrote:
> On 25/01/2012 22:57, SM wrote:
>>
>>
>> Are there any examples of DNS "caching services" set up to reduce 
>> network traffic and why it is being done?
>
> Hang on - isn't that the whole point of DNS caching? If people didn't 
> care about network traffic, no one would cache anything, they'd just 
> resolve the addresses every time. Apart from increased network 
> traffic, resolving every time would be much better, as there'd be no 
> stale data.
>
> So, pretty much every caching DNS server is there to reduce network 
> traffic. Isn't it?
Pretty much every ISP has caching DNS servers *partly* for this exact 
reason, yes.

The other reason is speed. Cached entries result in less latency when 
the authoritative DNS server is on the other side of the world. :)

-- 
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Brendan Hide
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