单项选择题
A. The office is using a public IP scheme.
B. The client is set to a static IP address.
C. The DHCP server is out of addresses.
D. The firewall on the PC is down.
单项选择题 A technician finished installing antivirus software. Which of the following should the technician perform NEXT?（）
单项选择题 The Device Manager in Windows XP shows that an incompatible device driver is installed. Which of the following BEST describes the icon that is displaying next to that device?（）
单项选择题 A client is having trouble connecting to the Internet. The client is using a static IP address and is able to connect to other devices on the network via IP address only. Which of the following is MOST likely the problem?（）