Routers transmit packets from one network to another based on the destination address. They do this by looking at the destination IP address of the packet and determining the best path based on its routing table. They then forward the packet to the device on the next best path.

Routers and switches are both network devices, but they have different functions. Routers are used to connect different networks and forward packets based on IP addresses. Switches connect multiple devices in a single network and forward data between them based on MAC addresses.

When choosing a router, you should consider your network needs, including network size, required speed, and features. For example, a large home may need a router with strong signal coverage and high-speed transmission capabilities, while a small office may need a router with more security features and high reliability