Huawei Certified ICT Associate – WLAN (HCIA-WLAN) — Question 7

Which of the following statements about carriers is false?

Answer options

• A. A carrier is an electromagnetic wave that is modulated to transmit a signal, and its waveform is typically a sine wave.
• B. Carrier signals can be produced by modulating the three components (frequency bandwidth, frequency, and phase) of electromagnetic waves.
• C. Carriers are the physical basis and bearer tool for transmitting voice and data information.
• D. The receiver end needs to parse carrier signals to obtain data.

Correct answer: B

Explanation

Option B is incorrect because carrier signals are typically modulated by varying amplitude, frequency, or phase rather than three separate components as stated. Options A, C, and D are accurate descriptions of carrier signals and their functions in communication systems.