The iPad has a Wi-Fi chip built-in. You simply go to settings, Wi-Fi, then select the network and enter the password (if applicable).
The iPad 3G has a GSM radio which users can optionally sign up for a no-contract data plan which will allow the iPad to use the SIM card's (AT&T) cell phone towers as internet just like any smartphone.
WIFI is wirless connection to the internet.
yes netbooks are wirless
yes
you have to synch them together
no.
Yes.
Ethernet and Wirless
No
# with an Ethernet cable
verizon wirless free on limited texting
you use the Wirless conections
Yes