If you have been to be a Windows user, you might notice about DNS cache feature in Windows platform. This is one of the key to speedup the whole system while surfing the internet especially when you are home. In case of you are an ADSL subscriber, average query time for popular domainnames is about 35 msecs while unpopular domainnames is about 300 msecs or more depending on number of hops to your origin name server. If caching enabled, the second try will be 1 or 2 msec constantly!

By default, Ubuntu has no local cache but you are able to enable this feature very easy. I found a good tutorial at Ubuntu blog. In this tutorial, a light-weight DNS called dnsmasq is used for caching every DNS query locally.

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