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Router

A router is a networking device that forwards data packets between computer networks, typically connecting local area networks (LANs) to wide area networks (WANs) like the internet. It operates at the network layer (Layer 3) of the OSI model, using IP addresses to determine the best path for data transmission and enabling communication between different networks.

Also known as: Network Router, Gateway, IP Router, Layer 3 Switch, WAN Router

🧊Why learn Router?

Developers should learn about routers when building networked applications, setting up cloud infrastructure, or managing IT systems, as they are essential for internet connectivity, network segmentation, and security. Use cases include configuring home or office networks, implementing VPNs, load balancing in data centers, and ensuring reliable data routing in distributed systems.