单项选择题
A. The network uses MAC filtering
B. The network uses WEP
C. The network uses SSID broadcast
D. The network uses WPA
单项选择题 Which of the following files are required to start Windows XP boot process?（）
单项选择题 Which of the following utilities, in Windows, can be configured to perform automatic disk defragmentation?（）
单项选择题 A technician is troubleshooting a WLAN card in a laptop. The wireless infrastructure is 802.11g. The WLAN card is showing connected at 11Mbps. Which of the following would be the BEST reason why the WLAN card is performing at that speed?（）