Computer Science for IGCSE & O level - Data Transmission (Section 10 - No. 41)
In half-duplex data transmission, data can be sent...
In one direction only.
Simultaneously in both directions.
In both directions but not at the same time.
Only over short distances.
Paskaidrojums
Half-duplex mode occurs when data can be sent in BOTH directions but not at the SAME TIME.