What you need to do
Connecting your PC to the internet with an ethernet cable takes three steps: locate the ethernet port on your computer, plug one end of the cable into that port, and plug the other end into your router or wall jack. Your PC will usually detect the connection automatically and start using it within seconds. If it does not, you may need to check a setting or restart your computer.
Ethernet is faster and more stable than Wi-Fi for most people, and it requires no password or setup beyond plugging in the cable. The only catch is that you need to be close enough to your router or network jack to run a cable, and the cable itself has to be long enough to reach.
Key Takeaways
- The ethernet port on your PC looks like a phone jack but slightly wider, and is usually on the back or side of your computer tower or laptop.
- Ethernet cables are cheap and come in different lengths; buy one long enough to reach from your PC to your router without stretching tight.
- Push the cable into the port until you hear or feel a click, and look for a light on the port or your router to confirm the connection is working.
- If your PC does not connect automatically, restart your computer or check Device Manager to see whether the ethernet adapter is turned on.
- Ethernet is more reliable than Wi-Fi for gaming, video calls, and large file transfers because the cable does not lose signal or get interference.
Finding the ethernet port on your PC
The ethernet port is a rectangular socket that looks similar to a phone jack but slightly larger. On a desktop tower, it is usually on the back panel near other ports like USB and audio jacks. On a laptop, it may be on the side, and some thin laptops do not have one built in.
If you cannot find the port on your computer, check the manufacturer's manual or the support page for your exact model — they will show you where it is. If your PC truly has no ethernet port, you can buy a USB ethernet adapter for $15 to $30 that plugs into a USB port and gives you an ethernet socket.
Choosing and running the cable
Ethernet cables come in different lengths, from 3 feet to 100 feet or more. Buy a cable long enough to reach from your PC to your router without being pulled tight, because a stretched cable can damage the connector. Cat5e and Cat6 cables are the most common and work fine for home internet; the difference in speed between them matters only if you have very fast internet (gigabit or faster).
Run the cable along the wall or under a rug if you need to, but avoid running it next to power cables or in places where people will trip on it. If the cable will be in a high-traffic area, consider cable covers or clips to hold it in place and protect it from damage.
Plugging in and confirming the connection
Hold the cable so the connector faces the right direction and push it straight into the ethernet port on your PC until you feel or hear a small click. The connector should sit flush with the port — if it does not click, pull it out and try again. Do the same on the other end, plugging it into your router or the wall jack.
Look for a light on the ethernet port itself or on your router. A solid or blinking light usually means the connection is working. On your PC, open your network settings and look for "Ethernet" in the list of connections — if it shows "Connected," you are online. If the light is off or the connection does not appear, unplug the cable, wait a few seconds, and plug it back in.
What to do if the connection does not work
If your PC does not recognize the ethernet connection after plugging in the cable, restart your computer first — this fixes the problem about half the time. While it restarts, also check that the cable is fully seated in both the PC port and the router port, and that the light on the port is on.
If restarting does not work, open Device Manager on your PC (right-click the Start button and select it, or search for "Device Manager" in the search box). Look for "Network adapters" and expand it. If you see a yellow warning symbol next to your ethernet adapter, right-click it and select "Enable device." If the adapter is not listed at all, your PC may not have an ethernet port, or the port may be damaged — in that case, a USB ethernet adapter is your next step.
When ethernet is better than Wi-Fi
Ethernet is faster and more stable than Wi-Fi because the cable does not lose signal, does not get interference from walls or other devices, and does not slow down when many people are using the network at once. If you do online gaming, video calls, or large file transfers, ethernet will give you better results.
The trade-off is that you have to stay in one place — you cannot move your PC around the house without unplugging and replugging the cable. If you need to move your computer often, or if running a cable is not practical, Wi-Fi is still a good choice, just not as reliable for demanding tasks.
Frequently Asked Questions
Do I need to install drivers for ethernet to work?
Most of the time, no. Windows and Mac both come with drivers for standard ethernet adapters, and they load automatically when you plug in the cable. If your PC is very old or uses an unusual adapter, you may need to read a driver from the manufacturer's website, but this is rare.
Can I use the same ethernet cable for my router and my PC?
No. One end of the cable must plug into your PC, and the other end must plug into your router or wall jack. You cannot split a single cable between two devices. If you need to connect multiple devices, you need multiple cables or a network switch.
Is it safe to leave an ethernet cable plugged in all the time?
Yes. Ethernet cables do not carry power, only data, so there is no shock or fire risk. Leaving it plugged in does not wear it out or use extra electricity. You can unplug it whenever you want without harming your PC or router.
What if my router does not have an ethernet port?
Most routers have at least one ethernet port, usually labeled "LAN" or "Ethernet." Check the back of your router for a port that looks like a phone jack. If your router truly has no ethernet port, you have a modem-only device, and you will need a separate router to use ethernet.
Can I use ethernet and Wi-Fi at the same time?
Yes, but your PC will use only one connection at a time. It usually picks ethernet automatically if it is plugged in, because ethernet is faster. You can also manually choose which connection to use in your network settings if you want to switch.