单项选择题
A company wants to secure access to its internal wireless network. The company wants to use themost secure means to access the network. Which of the following is the BEST choice for wireless security in this situation?（）
A. WEP encryption B. Channel rotation C. Disable SSID D. WPA encryption
单项选择题 Which of the following WAN technologies modulates 24 channels into a 1 5Mbps signal?（）
单项选择题 Which of the following ping parameters will set the size of the outgoing packet?（）
单项选择题 On which of the following cables would a technician find a BNC connector installed?（）
