Which of the following statements is incorrect?
A. Multiplexers are designed to accept data from several I/O devices and transmit a unified stream of data on one communication line.
B. HDLC is a standard synchronous communication protocol.
C. RTS/CTS is the way the DTE indicates that it is ready to transmit data and the way the DCE indicates that it is ready to accept data.
D. RTS/CTS is the way the terminal indicates ringing
E. None of the above
Answer: Option D
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