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What does "flush dns" mean?

post #1 of 3
Thread Starter 
I've been having some trouble with loading my Photobucket account recently, and the site's FAQs recommends clearing my browser's cache (done) and flushing my dns (also done, as the instructions were easy to follow). I know what the cache is, but have absolutely no idea what "flushing dns" does/means!
post #2 of 3
I had to google it. Here's one of the hits I found...

post #3 of 3
I suck at explaining stuff.. but this site did a pretty good job of it....

What Is DNS Caching? If a DNS Lookup sounds like it might take a few days, it doesn't. It may however take a few seconds. And it happens many times a day. It may occur several times before a full page can be displayed, if the page is composed of elements on different servers (ads, for example). There are times when the Internet is so congested that the wait is annoying. And if the DNS request requires a dial-up connection to be established, the browser may sometimes time out, requiring the user to renew the request. Every time the browser seeks a page on a website, the DNS lookup is repeated. If the user visits twenty pages on one site, the lookup is repeated twenty times. All for the same identical IP address. If the lookup takes three seconds, that is a total of sixty seconds spent waiting. One solution to these delays is to store a copy of the domain names and their corresponding addresses in a computer on the LAN. This is called DNS caching. Retrieving an IP address from the local cache is almost instantaneous. This eliminates many delays and speeds up browsing for the end user." Found at.... http://www.vicomsoft.com/glossary/dnscaching.html

Sometimes the Domain Name Server (DNS) will record incorrect information. So whenever you go to the site it has the wrong information for, you won't be able to access it. The DNS clears itself after 24 hours, but if you don't want to wait that long you can clear it yourself, which you did...
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