Internet stops working even though connected?

So I've been having this problem for about a week or so now...my internet will be fine and connected and then suddenly it stops working even though it still says it's connected to the network. Then I just turn my airport off and then back on and it works again. It only happens on my computer, all the other computers/laptops in the house are working fine...any ideas as to why this is happening and how to fix it???

what kind of router? i am having same issue sometimes. i have linksys wrt54gs and im connected to router, but no internet, but everyone else in the house is on windows and gets internet connection.

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