When a router runs out of Ethernet ports for devices like smart TVs, consoles, NAS drives and desktop PCs, the fix is an inexpensive plug-and-play Ethernet switch rather than a router upgrade. The switch connects to one of the router's LAN ports and instantly adds four, seven, 15 or more wired connections to the network.
A tech explainer clarifies the difference between a router's WAN port, which connects to a modem or ONT for internet access, and its LAN ports, which link wired devices like PCs, consoles, TVs and NAS units inside the home. It notes that combo router/modem units skip the WAN port entirely, while some routers use flexible WAN/LAN or auto-sensing ports instead of clearly labeled ones.
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Most routers include a single WAN port alongside multiple LAN ports, and although the connectors look identical, they perform very different jobs. The WAN port links your router to the internet, while LAN ports connect local devices like PCs, TVs and consoles so they can talk to each other and share that connection.