Certified Network Defender (CND) — Question 63

In which of the following transmission modes is communication uni-directional?

Answer options

• A. Root mode
• B. Full-duplex mode
• C. Half-duplex mode
• D. Simplex mode

Correct answer: D

Explanation

The correct answer is D, Simplex mode, as it allows data to flow in only one direction without any capability for reverse communication. Full-duplex mode (B) supports two-way communication simultaneously, while Half-duplex mode (C) allows two-way communication but only one direction at a time. Root mode (A) is not a standard transmission mode.