What is a layer 3 networking device that use IP addressing to forward packets between networks?

• A. Router
• B. Switch
• C. Bridge
• D. Hub

Answer: (A)

A router is the device that uses IP addressing to forward packets between networks. It operates at the network layer, looking at the destination IP address in each packet and using its routing table (often built from routing protocols) to decide the best next hop toward the destination network. This ability to connect multiple networks and move traffic across subnet boundaries is what enables inter-network communication. In contrast, switches and bridges work at the data link layer and forward frames based on MAC addresses within the same network, while a hub simply repeats signals without making forwarding decisions. So, when the task involves moving IP packets from one network to another, the router is the appropriate device.