Nokia Certified Network Associate (NCNA) — Question 31

Which of the following best describes a repeater?

Answer options

• A. A passive device simply used to connect two or more cables. Does not generate or amplify any signals.
• B. A device that receives and retransmits a signal out its ports, but does not do any Layer 2 analysis of the data.
• C. A device that receives a signal and based on the Layer 2 destination address, makes a decision on which ports the signal should be retransmitted.
• D. A device that receives a signal and based on the Layer 3 destination address, makes a decision on which ports the signal should be retransmitted.

Correct answer: B

Explanation

The correct answer is B because a repeater is designed to receive and retransmit signals without analyzing data at Layer 2. Option A describes a passive device that does not function as a repeater, while options C and D refer to devices that operate at Layer 2 and Layer 3, respectively, which is not the role of a repeater.