14. In ( ) mode, the communication is unidirectional, like a one-way street. Only one of the two stations on a link can transmit;the other can only receive.
A. half-duplex
B. full-duplex
C. simplex
D. none of the above
(责任编辑:admin)要这答案加QQ:800020900 或加微信:vq800020900 获取