When you use Network Magic and connect to another network, you control your computer's connection and how you want to proceed.
Typically, you can use Network Magic and connect to another network (for example, while you are away from home):
If you want to use another network temporarily
There are special cases where Network Magic connects to another network. If this occurs, you specify what you want to do, based on the situation:
If you replace the router in your network
If you accidentally connect to two or more networks
If you accidentally connect to an unknown wireless network