Curious about WiFi - Wireless Internet Access?

I am getting ready to buy a laptop and I am planning on buying one that is wireless capable. I will need it during business trips. But, I don't understand the difference between the wireless cards, ethernet cards... Are their different, better quality numbers I should look for? Maybe that will connect better... show more I am getting ready to buy a laptop and I am planning on buying one that is wireless capable. I will need it during business trips. But, I don't understand the difference between the wireless cards, ethernet cards... Are their different, better quality numbers I should look for? Maybe that will connect better and more securely? Also, if I am at a resort and I am online via wireless access, can anyone tap into my computer?

Thanks for your help!
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