单项选择题 You are able to access a Web server from your computer by using the IP address of the Web server. You fail to access the Web server when you use its fully qualified domain name. Other users on your network can access the Web server by using both the IP address and the fully qualified domain name. You need to access the Web server by using the fully qualified domain name. What should you do?（）

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

单项选择题 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?（）