Your computer is unable to access external names or IP addresses. You need to connect to external Internet resources.
What should you do first?（）

You connect your computer to a wireless network. You discover that this new connection fails to show in the Connect to a network window.
You need to view this connection in the Connect to a network window.
What should you do?（）

Your portable computer has a Virtual Private Network (VPN) connection configured. You need to connect to the VPN.
What should you do?（）

You have a computer that runs Windows Vista.
You need to prevent an application from connecting to the Internet.
 What should you do?（）