In asynchronous serial communication the physical layer provides ___________
A. start and stop signalling
B. flow control
C. both start & stop signalling and flow control
D. only start signalling
Answer:C
In asynchronous serial communication the physical layer provides ___________
A. start and stop signalling B. flow control C. both start & stop signalling and flow control D. only start signalling
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.