Name the three types of datalinks.

Name the three types of datalinks.

• A. Simplex, Duplex, and Half-Duplex
• B. Wireless, Wired, and Cellular
• C. Analog, Digital, and Hybrid
• D. Data-Link, Phone-Link, and Radio-Link

Answer: (A)

The key idea here is how data can flow between two points over a datalink: in one direction, in two directions with turning, or in two directions at the same time. Simplex is one-way communication, like a TV broadcast. Half-duplex allows two-way communication but not at the same time, as with walkie-talkies where you have to release the button to listen. Full duplex (often just called duplex) enables two-way communication simultaneously, like a phone call. The option lists these three modes—Simplex, Duplex, and Half-Duplex—which together describe all standard data-link transmission directions. The other choices describe different classifications (such as wireless vs wired vs cellular or analog vs digital) and don’t address how data flows between endpoints.

The key idea here is how data can flow between two points over a datalink: in one direction, in two directions with turning, or in two directions at the same time. Simplex is one-way communication, like a TV broadcast. Half-duplex allows two-way communication but not at the same time, as with walkie-talkies where you have to release the button to listen. Full duplex (often just called duplex) enables two-way communication simultaneously, like a phone call. The option lists these three modes—Simplex, Duplex, and Half-Duplex—which together describe all standard data-link transmission directions. The other choices describe different classifications (such as wireless vs wired vs cellular or analog vs digital) and don’t address how data flows between endpoints.