The major difference between switching and routing lies in how they move data across a network. Switching is used within a local area network (LAN) to connect devices like computers, printers, and servers. It uses MAC (Media Access Control) addresses to forward data to the correct device within the same network. A switch learns the MAC addresses of the devices connected to it and sends data only to the intended recipient, making communication faster and more efficient.

Routing is used to connect different networks, such as linking a home network to the internet. Routers use IP (Internet Protocol) addresses to figure out the best path for data to travel between networks. Unlike switches, routers look at the destination IP address and choose the most efficient route for sending data, often passing through multiple networks before reaching the destination. Switching works within one network to connect devices, while routing connects different networks to move data between them. Both are important for building a reliable network.