Connecting an Ethernet cable takes three steps: plug one end into your device, plug the other into your router or wall jack, and wait for the connection to register

An Ethernet connection is a physical cable that carries internet to your device. Unlike Wi-Fi, it does not broadcast — the cable itself is the link. Most devices recognize the connection automatically once both ends are plugged in, though some older computers or phones may need a manual step to switch from Wi-Fi to wired.

The cable has a connector on each end that looks like a thick phone jack. One end goes into your device (if it has an Ethernet port), and the other goes into your router, a wall jack, or a network switch. The connection is live as soon as both are seated — there is no pairing step or password to enter.

Key Takeaways

  • Ethernet cables plug into a port on your device and into a router or wall jack; the connection works immediately without setup.
  • Most laptops, desktops, and network-attached devices have an Ethernet port, but phones and tablets usually do not unless you add a USB adapter.
  • If your device does not automatically switch to the wired connection, you may need to disable Wi-Fi or select Ethernet in your network settings.
  • Ethernet is faster and more stable than Wi-Fi because the signal travels through a cable instead of through the air.

Finding the Ethernet port on your device

Desktop computers almost always have an Ethernet port on the back of the tower or on the rear panel of an all-in-one machine. Look for a rectangular jack slightly wider than a phone jack — it is usually labeled with a small icon of a cable or network symbol, or marked "LAN" or "Ethernet".

Laptops vary. Older models (five years or more) typically have a port on the side or back. Newer laptops, especially thin models, often do not include one. If your laptop has no port, you can buy a USB Ethernet adapter (also called a USB network adapter) that plugs into a USB port and gives you an Ethernet jack. These cost between $15 and $40 and work with Windows, Mac, and Linux.

Phones and tablets rarely have Ethernet ports built in. If you need to connect one, a USB-C or Lightning Ethernet adapter exists for most models, though these are less common and more expensive than laptop adapters. Many people skip this step and use Wi-Fi or mobile data instead.

Plugging in the cable

Take an Ethernet cable (also called a Cat5e, Cat6, or Cat6a cable — the exact type matters less for home use) and push one end firmly into the port on your device until you hear or feel a small click. The connector has a latch that locks into place. Do the same with the other end into your router, wall jack, or network switch.

The cable should not be loose or partially inserted. If it does not click, try again — a loose connection will either not work or will drop frequently. Once both ends are seated, you should see a light on the port (usually green or amber) indicating the connection is active. Some devices also show a light on the cable itself near one of the connectors.

If you are connecting to a wall jack instead of a router, that jack is part of your building's network infrastructure and connects to your router or modem elsewhere. The process is the same from your device's perspective.

Switching your device to use the Ethernet connection

Most devices detect the Ethernet cable automatically and switch to it within a few seconds. You may see a notification that a wired connection is now available. On Windows, the system usually prefers Ethernet over Wi-Fi once it is plugged in, so you may not need to do anything.

On Mac, go to System Settings (or System Preferences on older versions), click Network, and look for Ethernet in the list on the left. If it shows "Connected", you are done. If it shows a status like "Not Configured", click it and then click Configure to set it up.

On Linux, the connection usually appears in your network manager automatically. If it does not, right-click the network icon in your taskbar and look for an option to connect to a wired network.

If your device is still using Wi-Fi after the Ethernet is plugged in, you can manually disable Wi-Fi to force it to use the cable. On Windows, open Settings, go to Network & Internet, and toggle Wi-Fi off. On Mac, click the Wi-Fi icon in the menu bar and select "Turn Wi-Fi Off". On phones and tablets, go to Settings and toggle Wi-Fi off.

Checking that the connection is working

Open a web browser and visit any website. If the page loads, your Ethernet connection is working. You can also check your connection speed by visiting a speed test site like Speedtest.net or Fast.com. Wired connections are typically faster and more stable than Wi-Fi, so you should see consistent speeds without drops.

If the page does not load, first check that both ends of the cable are fully seated. Unplug and replug each end to make sure the latches are locked. If that does not work, try a different Ethernet cable — the cable itself may be damaged. If a different cable works, the original cable is faulty and should be replaced.

If the cable is fine but the connection still does not work, restart your device. Sometimes the network driver needs a fresh start to recognize the port. If restarting does not help, check your router to make sure it is powered on and that the port you plugged into is not disabled.

Ethernet vs. Wi-Fi: when to use each

Ethernet is faster, more stable, and has lower latency (delay) than Wi-Fi. Use it for activities that demand reliability: online gaming, video conferencing, large file transfers, or streaming video. The cable also does not interfere with other wireless devices and does not slow down when many people are using the network.

Wi-Fi is more convenient because you do not need a cable, and it works with phones, tablets, and devices in other rooms. Use it for everyday browsing, email, and social media. The trade-off is that Wi-Fi is slower and can drop if you move too far from the router or if there is interference from walls or other wireless devices.

Many people use both: Ethernet for a desktop or laptop that stays in one place, and Wi-Fi for phones and tablets that move around. This gives you the best of each.

Troubleshooting a connection that keeps dropping

If your Ethernet connection works at first but then stops, the cable may be loose. Check both ends and make sure the latches are fully clicked. Gently tug on the cable near each connector — it should not move. If it does, unplug and replug it.

If the cable is tight but the connection still drops, try a different cable. Ethernet cables can wear out or be damaged inside even if they look fine on the outside. A faulty cable will work intermittently, dropping and reconnecting every few minutes or hours.

If a new cable does not fix it, the port on your device or router may be damaged. Try plugging into a different port on your router if it has more than one. If your device has only one port and it is not working, you may need to use a USB adapter or switch to Wi-Fi.

Frequently Asked Questions

Do I need to restart my device after plugging in Ethernet?

Usually not. Most devices recognize the cable within a few seconds and switch to it automatically. If the connection does not appear after waiting 10 seconds, try restarting your device. A restart forces the network driver to reload and often fixes connection issues.

Can I use Ethernet and Wi-Fi at the same time?

Yes, but your device will prioritize one over the other. On most systems, Ethernet takes priority, so Wi-Fi becomes a backup if the cable is unplugged. You cannot split a single internet connection between both — the device uses one or the other, not both simultaneously.

What if my router does not have an Ethernet port?

Most routers have at least one Ethernet port on the back, usually labeled "LAN". If yours does not, it is a Wi-Fi-only router and cannot accept a wired connection. You would need to buy a separate network switch or upgrade to a router with Ethernet ports.

Is one type of Ethernet cable better than another?

For home use, Cat5e and Cat6 cables work equally well. Cat6 is slightly newer and can handle higher speeds, but the difference is not noticeable unless you have very fast internet (over 1 gigabit per second). Any cable labeled Cat5e or higher will work fine. Avoid very cheap cables, as they may have loose connectors or poor shielding.

Can I run an Ethernet cable through walls?

Yes, but it requires drilling holes and running the cable through the wall cavity. This is common in offices and new construction. If you are renting or do not want to drill, you can run the cable along the baseboard or use a cable raceway (a plastic channel that attaches to the wall) to hide it. Some people also use powerline adapters, which send the internet signal through your electrical wiring instead of a cable, though these are slower than Ethernet.