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

单项选择题 You have a computer that runs Windows Vista. You need to prevent all inbound traffic to your computer without being notified. What should you do?（）

单项选择题 You install a new hardware router that provides wireless network connectivity between your computer and the Internet. You connect to the router by using a wireless network adapter. Your computer is able to access the Internet but is unable to discover other computers in the local wireless network. You need to configure the wireless connection to allow your computer to discover other computers. What should you do?（）