Question
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 DCW indicates that it is ready to accept data
d.
RTS/CTS is the way the terminal indicates ringing
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