Question

What describes the work of a repeater?

• A. Regenerates weak signals
• B. Resolves domain to IP address
• C. Unique hardware address
• D. Circuit switching

Hint:

Repeaters operate at the Physical Layer (Layer 1) of the OSI model.
They regenerate and clean up signals rather than merely amplifying noise.

Answer 1

The Correct Option is A

Concept:
As data signals travel along physical transmission cables, they lose strength due to resistance, attenuation, and environmental noise.
A repeater is a physical layer networking device designed to extend the maximum reach of a network cable segment.

Step 1: Function of a Repeater:
When an electrical or optical signal travels over long distances, it undergoes attenuation.
A repeater receives this incoming, degraded signal, amplifies or regenerates it bit-by-bit back to its original strength and shape, and retransmits it onto subsequent segments.

Step 2: Evaluating Other Options:
- Resolving domain names to IP addresses is the role of a DNS server.
- A unique hardware address refers to a MAC address burned into a network interface card (NIC).
- Circuit switching is a connection-oriented communication method used in traditional telephone networks.
Final Answer:
The primary function of a repeater is to regenerate weak signals. Hence, option (A) is correct.