Huawei Certified Network Associate – Routing and Switching (HCNA-RS, legacy) — Question 120

An Ethernet port can work one of three duplex modes, whereas an Optical Ethernet port only supports one single mode.
Which of the following represents this mode?

Answer options

• A. Full-duplex
• B. Half-duplex
• C. Auto-negotiation
• D. Simplex

Correct answer: A

Explanation

The correct answer is A, Full-duplex, as it describes a mode where data can be sent and received simultaneously. Half-duplex (B) allows for data to flow in one direction at a time, Auto-negotiation (C) is a method for determining the best mode, and Simplex (D) refers to one-way communication only.