WAP or WPA - both are legitimate acronyms, but they mean different things.
WAP is a very old form of mobile browsing. Any mobile data setup information you get from your network, but as long as your APN (Access Point Names) settings are OK and your account is enabled for data you should be OK. Speak to your network provider, or check their website.
WPA is an encryption system used for WiFi networks. You need to get that from whoever is running the particular WiFi network (edit: or, as Roger says, the default one may be on the router - I always miss the obvious solution!).