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.

Occurrence: 0, System Administrator 2026

In asynchronous serial communication the physical layer provides ___________ | Both start & stop signalling and flow control | CSS, PMS, PPSC, FPSC, KPPSC, SPSC, ISSB and NTS Past Papers | Pakistan's Largest Online Past Papers Database

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