单项选择题 Your computer has Microsoft Windows Firewall enabled.  Your child plays an online game that uses connectionless traffic over port 5678 for inbound and outbound traffic.  You need to prevent your child from playing this game.  What should you do？ （）

单项选择题 Your computer is part of a workgroup. You share files with other users on the network. You configure exceptions in Microsoft Windows Firewall to allow file sharing. Users report that they are unable to connect to your computer.  You need to ensure that other users are able to access only the shared files.  What should you do？ （）

单项选择题 You need to remove any Microsoft Windows Internet Explorer 7 add-ons in Microsoft Windows Vista computers that do not have prior approval from the following authorities： Microsoft  System manufacturer  Service provider What should you do？ （）