单项选择题
A. The subnet mask is not correctly configured.
B. The DNS client has not been configured on the computer.
C. The DHCP client is unable to obtain an IP address from the DHCP server.
D. The default gateway is not specified
单项选择题 Which of the following is the BEST solution for repairing a hard drive that results in the NTLDR ismissing display upon booting?（）
单项选择题 A technician is called for a computer that is not connecting to the network. Which of the following would be the MOST common tool used to identify the issue? （）
单项选择题 A client has been unable to fix corruption of system files and does not have a backup or an Automated System Recovery (ASR) disk. Which of the following is the BEST action to take next? （）