单项选择题
Which of the following wireless standards has a MAXIMUM throughput, by default, of 11Mbps?（）
A.802.11g B.802.11a C.802.1n D.802.11b
单项选择题 Which of the following protocols is commonly used by ping?（）
单项选择题 The "1000" in 1000BaseT cabling represents which of the following?（）
单项选择题 Which of the following wireless technologies can operate at only 5GHz?（）
