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Computer Networks
Physical Layer
Q
In asynchronous serial communication the physical layer provides ___________
AA. Start and stop signalling
BB. Flow control
CC. Both start & stop signalling and flow control
DD. Only start signalling
Correct Answer:
C. C. Both start & stop signalling and flow control
Explanation:
In asynchronous serial communication, the communication is not synchronized by clock signal. Instead of a start and stop signaling and flow control method is followed. Unlike asynchronous serial communication, in synchronous serial communication a clock signal is used for communication, so the start and stop method is not really required.
