Engadget
You don't need a new router to get more Ethernet ports; the solution is much simpler.
With more and more devices offering internet connectivity, running out of Ethernet ports on your router is a common frustration. A few ports aren't enough to connect your smart TV, game consoles, desktop computers, NAS drives, home office equipment and more. If you're maxed out, you might assume you need a new router, but that's not the case.
The real solution is simpler, more affordable and takes only minutes to set up: an Ethernet switch. Depending on the model, a single switch can add four, seven, 15 or even more ports to your setup — all without replacing your router or reconfiguring your network.
Let's go over how Ethernet switches work and how they differ from routers, which port to use and what alternatives exist if running new cables isn't an option.
Most home routers come with four LAN ports and one WAN port. Even if this was enough when you bought your router, needs can change.
If all ports are already in use, an Ethernet switch will add more connections to your existing router.
A basic switch doesn't do this; it provides more Ethernet ports for the router and makes sure data sent from devices connected to it goes to the right place. A switch doesn't replace your router or affect Wi-Fi performance.
If your computer and router both have a 2.5 gigabit Ethernet port and are connected by a cable that supports 2.5 Gbps.