Home Server Connection Speed [closed]

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http://serverfault.com – So I've been working on an image hosting/sharing website for a while now. It's a self project and I have been thinking maybe It's time for me to buy a server and host it in my home. I now have a 4Mbps internet connection but was wondering what a home server would need? I know the bigger the better but what's a speed that would be just fine. And maybe I can work something out with my ISP and increase the standard upload speed for my connection. And lastly does the download speed count? I'm a dumb in server administration and stuff so pardon :) for my ignorance. I'm just starting and this idea o (HowTos)