单项选择题
802.11g wireless signals operating at 24GHz has a maximum line of sight range of which of thefollowing?（）
A. 460 feet (140 meters) B. 540 feet (165 meters) C. 560 feet (171 meters) D. 840 feet (256 meters)
单项选择题 Link aggregation is also known as port:（）
单项选择题 When verifying a new wireless installation the administrator is unable to see a wireless signal withany wireless laptop. The MOST likely problem is:（）
单项选择题 Which of the following WAN protocols is a circuit switching technology?（）
