Domain Name Service, a method of converting a textual doman name to an IP address

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Why do local network hostnames resolve only in certain cases?

I have a linksys router which runs "tomato" Linux and serves as the local DNS server. It runs dnsmasq. I recently upgraded from OS X 10.4 to 10.6. Since then, resolution of hostnames on my local ...
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2answers
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How do I flush the DNS cache on a OS X 10.6 machine?

Trying to flush the local DNS cache. How is this done on Snow Leopard? Using System Preferences and using the terminal?
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What does the dynamic global hostname option in sharing settings do?

Can anyone explain what this option does?