The maximum data rate of any single wireless link can be described by the shannon’s theorem which is related tot he（）inhertz，and the noise on the channel.

单项选择题This implementation takes place at the（）level of OSI model network structure.

A.physical
B.link
C.network
D.transport

单项选择题Wireless telecommunications networks are generally implemented and administered using（）communication

A.microwave
B.radio
C.FM
D.AM