Samsung GT-P7100 사용자 설명서

Connecting to networks and devices

You can make the tablet forget about the details of a Wi-Fi network that you added—for example, if you don’t want the 

tablet to connect to it automatically or if it is a network that you no longer use.

Turn on Wi-Fi, if it’s not already on.

In the Wi-Fi settings screen, touch the name of the network.

Touch 

Forget in the dialog that opens.

By default, the tablet disconnects from Wi-Fi when the screen turns off and connects to a mobile data network instead. 

It does this to conserve battery power, and reconnects to Wi-Fi again when you wake it.
You can change this policy to stay connected to Wi-Fi when the tablet is connected to a charger (when battery life isn’t a 

problem), or never to disconnect from Wi-Fi, which trades battery life for reduced mobile network data use.

On the Wi-Fi settings screen, touch Wi-Fi disconnect policy.

Touch the policy you want.