What You Need Before You Start
Connecting to ethernet requires three things: an ethernet cable, an ethernet port on your device, and a router or modem with an available ethernet port. Most desktop computers and laptops have an ethernet port built in — it looks like a slightly wider phone jack. If your device does not have one, you will need a USB ethernet adapter, which plugs into a USB port and gives you an ethernet connection. Tablets and phones rarely have ethernet ports, so adapters exist for those too, but they are less common.
The ethernet cable itself is inexpensive and comes in different lengths. A standard cable works fine for most setups. If you are running cable across a room or down a hallway, buy a length that reaches without stretching tight — coiled or kinked cables can degrade the connection over time. The cable has a connector on each end that looks like a phone plug with eight tiny pins inside.
Your router or modem will have multiple ethernet ports on the back, usually labeled 1, 2, 3, and 4. Any of these ports works the same way. If you have a separate modem and router, plug the cable into one of the numbered ports on the router, not the port labeled "WAN" or "Internet" — that one connects to your modem.
Key Takeaways
- Plug one end of the ethernet cable into your device's ethernet port and the other end into any numbered port on your router.
- Your device will recognize the connection automatically in most cases — no setup or passwords required.
- If your device does not have an ethernet port, a USB ethernet adapter costs $15 to $30 and works with most computers and tablets.
- A wired connection is faster and more stable than Wi-Fi for gaming, video calls, and large file transfers.
Connecting a Desktop or Laptop
Locate the ethernet port on your device. On a desktop, it is usually on the back of the tower near other ports. On a laptop, it is typically on the side or back edge. The port has a small plastic tab that clicks when you insert the cable — push the connector in until you hear or feel the click.
Plug the other end of the cable into one of the numbered ports on your router. The connection is active when ready. Your device will detect the wired network and switch to it automatically. On Windows, you may see a notification in the system tray saying "Ethernet connected." On Mac, the ethernet icon appears in the menu bar at the top of the screen. You do not need to enter a password or configure anything — ethernet connections work without authentication by default.
If your device does not recognize the connection after 30 seconds, restart your device or unplug and replug the cable. If the problem persists, try a different numbered port on the router. A faulty port is rare but possible.
Using a USB Ethernet Adapter
If your device has no ethernet port, a USB ethernet adapter is the solution. These adapters are small devices that plug into a USB port on one end and have an ethernet port on the other. They cost between $15 and $30 and work with Windows, Mac, and many tablets and phones.
Plug the adapter into an available USB port on your device. Plug the ethernet cable into the adapter's port, then plug the other end into your router. Windows and Mac will install drivers automatically — this usually takes 10 to 30 seconds. Once the drivers load, the connection works the same as a built-in port. You may see a notification confirming the connection is active.
Some adapters require a separate power source, especially older ones or those designed for high-speed connections. Check the adapter's instructions. Most modern USB adapters draw power from the USB port itself and need nothing else.
Checking Your Connection Speed
Once connected, you can verify that ethernet is working and measure your speed. On Windows, open Settings, go to Network & Internet, then Ethernet, and you will see "Connected" and the speed listed (usually 100 Mbps or 1000 Mbps). On Mac, click the Apple menu, select System Settings, go to Network, and click Ethernet — it will show "Connected" and the speed.
If you want to test your actual internet speed, use a free tool like Speedtest.net or Fast.com. These sites measure how fast data travels between your device and their servers. Run the test on ethernet, then on Wi-Fi from the same location to compare. Ethernet typically shows faster speeds and lower latency, especially if your Wi-Fi signal is weak.
If your ethernet speed is much slower than expected — for example, showing 100 Mbps when your internet plan is 500 Mbps — the cable or port may be damaged. Try a different cable or a different port on the router. If the speed improves, the original cable or port was the problem.
Switching Between Ethernet and Wi-Fi
Your device will prefer ethernet over Wi-Fi automatically when both are connected. This is the default behavior on Windows, Mac, and most other systems. If you want to disconnect ethernet and use Wi-Fi instead, straightforward unplug the cable. Your device will switch to Wi-Fi within a few seconds.
If you want to disable ethernet without unplugging the cable, you can turn it off in your network settings. On Windows, go to Settings > Network & Internet > Ethernet and toggle it off. On Mac, go to System Settings > Network, select Ethernet, and click "Turn Wi-Fi On" (which disables ethernet). This is useful if you want to test Wi-Fi performance or troubleshoot a connection problem.
You can also have both connections active at the same time without switching. Some devices allow you to choose which connection to use for specific tasks, though this is rarely necessary. For most people, plugging in ethernet and unplugging it when done is the simplest approach.
Troubleshooting a Failed Connection
If you plug in the cable and nothing happens, start with the basics. Check that both ends of the cable are fully inserted — the connector should click into place. Look at the ethernet port on your device and router for any visible damage, bent pins, or debris. If the port looks damaged, try a different port on the router or use a USB adapter instead.
Restart your device. Many connection problems resolve after a restart. Unplug the ethernet cable, wait 10 seconds, and plug it back in. If the device still does not recognize the connection, try a different ethernet cable — the original cable may be faulty. Ethernet cables are cheap and fail occasionally, especially if they have been coiled tightly or run under heavy furniture.
If you have tried a different cable and a different port and the device still does not connect, the ethernet port on your device may be broken. This is uncommon but does happen. A USB ethernet adapter will work around this problem. If the adapter also fails to connect, the issue may be with your router — restart the router by unplugging it for 30 seconds, then plugging it back in.
Frequently Asked Questions
Do I need to install drivers for ethernet to work?
No, not for built-in ethernet ports. Windows and Mac recognize them automatically. USB ethernet adapters may need drivers, but most modern adapters install them automatically when you plug them in. If an adapter does not work when ready, check the manufacturer's website for driver downloads.
Can I use any ethernet cable, or do I need a specific type?
Any standard ethernet cable works for home internet. Cables are labeled Cat5e, Cat6, or Cat7 — these refer to the cable's maximum speed. For most home use, Cat5e is fine and is the cheapest option. Cat6 is slightly faster and costs a bit more. The difference matters only if you have very fast internet (over 1 Gbps) and need maximum speed.
Is ethernet faster than Wi-Fi?
Ethernet is typically faster and more stable. It has lower latency, meaning less delay between sending and receiving data. This matters most for online gaming, video calls, and large file transfers. Wi-Fi is convenient but shares bandwidth with other devices and can be affected by walls and distance from the router.
What if my router does not have an available ethernet port?
Most routers have four numbered ports, so you can connect up to four devices. If all ports are in use, you can buy a network switch — a small device that plugs into one router port and provides four or more additional ports. Switches cost $20 to $50 and work transparently; your device will not know the difference.
Can I use ethernet on my phone or tablet?
Yes, with a USB ethernet adapter designed for your device. iPhones and iPads use a Lightning to Ethernet adapter, and Android phones use a USB-C adapter. These are less common than computer adapters and cost more, but they work the same way. Not all phones and tablets support ethernet adapters, so check your device's specifications first.