Many users face a situation where their wireless connection no longer provides the stable speed needed for work or entertainment. Streaming 4K video, online gaming, and downloading large files require maximum bandwidth, which can often only be guaranteed by a wireless network. wired Ethernet cableSwitching from Wi-Fi to a local network is not just a matter of physically connecting with a cable, but also of properly setting priorities in the operating system.
In this article, we'll take a detailed look at how to make your computer, laptop, or Smart TV ignore a weak radio signal and use a reliable cable. You'll learn the intricacies of setting up network interfaces in Windows and macOS, as well as how to properly configure your router to share the internet via LAN ports.
Connection stability directly impacts gaming ping and download speed. Twisted pair Category 5e or 6 cables enable speeds of up to 1 Gbps and beyond, which is virtually impossible to guarantee in the congested airwaves of an apartment building. Switching to cable eliminates interference from microwaves, neighbors' routers, and Bluetooth devices.
Physical connection and equipment testing
The first step is always to check the physical integrity of the connections. You'll need a working Ethernet cable (twisted pair) with RJ-45 connectors on both ends. One end plugs into the router's LAN port, and the other into the computer's or set-top box's network card. It's important to ensure the connectors click into place.
Pay attention to the network card's LED indicators. If the connection is successful, the LED next to the port should light up and blink rapidly as data is transferred. If the indicators are silent, the problem may lie with the cable itself, a damaged port, or drivers. Network card drivers must be installed and up to date for the equipment to operate correctly.
⚠️ Attention: Don't try to connect an Ethernet cable to the WAN (Internet) port on your computer unless you're configuring the router as a client. On your PC, use only the LAN ports or the network card.
Cable length also matters. The Ethernet standard allows data transmission over distances of up to 100 meters without loss of quality. However, using cables that are too long or too cheap in environments with strong electromagnetic interference can lead to a drop in speed. For home use, standard patch cords of 1 to 15 meters in length are usually sufficient.
Setting Network Priority in Windows
The Windows operating system can detect your connection type by default. If you plug in a cable, the system will usually automatically switch to it, pushing Wi-Fi into the background. However, sometimes manual configuration is required. interface metricsto force the system to use a wired connection first.
To do this, open the Control Panel and go to Network and Internet, then Network and Sharing Center. Select Change adapter settings. Find your wired connection (often called Ethernet), right-click it, and select Properties. Find Internet Protocol Version 4 (TCP/IPv4) in the list, select it, and click Properties again.
In the window that opens, click the "Advanced" button. At the very bottom, you'll see a checkbox labeled "Automatically assign metric." Uncheck it and enter 10 in the "Interface metric" field. For the Wi-Fi adapter, follow the same steps, but enter 20 or 30 as the metric. The lower the number, the higher the priority.
☑️ Check Windows settings
Once the settings are applied, the system will prioritize the cable connection. If the cable is disconnected, Windows will automatically switch to Wi-Fi without interrupting the internet connection. This ensures uninterrupted performance even when the laptop is physically moved.
Switching to a cable on macOS and Linux
In Apple's operating system, network service management is organized by service order. macOS automatically prioritizes a wired connection if one is detected, but you can check and change the order manually. Go to System Preferences and select Network.
In the list of interfaces, click the three-dot button or the gear icon (depending on your macOS version) and select "Set Service Order." Drag "Ethernet" or "USB LAN" to the top of the list. Click "OK" and "Apply." The system will now attempt to obtain an address via the cable.
In Linux distributions such as Ubuntu or Debian, management is often accomplished through NetworkManager. In the graphical interface, a wired connection is usually prioritized by default. If fine-tuning is required, you can edit configuration files or use a utility. nmcliFor example, the team nmcli connection modify "Wired connection 1" connection.autoconnect-priority 100 will increase the priority.
Hidden DNS Settings in Linux
In Linux, you can specify static DNS servers for a wired connection in the /etc/resolv.conf file or through the NetworkManager settings to speed up domain response.
For Linux terminal users, it is useful to know that the connection status can be checked with the command ip addr or ifconfigThe presence of an IP address in the interface eth0 or enp3s0 indicates successful acquisition of an address via DHCP via cable.
Setting up Smart TV and game consoles
Owners of Smart TVs (Samsung, LG, Sony) and consoles (PlayStation, Xbox) often complain about video buffering. These devices have a built-in priority: if a cable is plugged into the LAN port, they ignore the Wi-Fi module. However, sometimes resetting the network settings is necessary.
Go to the TV menu and find the "Network" section. Select "Wired" as the connection type. The device will attempt to configure settings automatically. If you still can't connect to the internet, try manually entering the IP address to ensure there are no conflicts with other devices on the network.
| Device | Settings menu | Connection type | Action |
|---|---|---|---|
| Samsung TV | Network Settings | Cable (LAN) | Auto / IP Settings |
| LG WebOS | Network Connection | Wired (Ethernet) | Advanced Wi-Fi Settings |
| PlayStation 5 | Settings -> Network | Set Up Internet Connection | LAN Cable |
| Xbox Series X | Settings -> Network | Network settings | Wired |
It's important to use high-quality cables for the next-generation consoles. For PlayStation 5 and Xbox Series X, Category 5e or Category 6 cables are recommended to support speeds above 1 Gbps, if your router and ISP support it. This will reduce latency in online games.
Troubleshooting LAN connection issues
Sometimes the cable is connected, but the internet isn't working. The first cause is a faulty cable itself. Check its integrity and visually inspect it for kinks. If possible, replace the cable with a known-good one.
The second reason is problems with the DHCP server on the router. If the device doesn't receive an IP address automatically, try assigning a static address. To do this, you'll need to know the gateway address (usually 192.168.0.1 or 192.168.1.1). In the IPv4 properties, select "Use the following IP address" and enter the information corresponding to your subnet.
⚠️ Attention: When manually registering an IP address, make sure that the selected address is not occupied by another device on the network, otherwise an IP conflict will occur and the Internet will disappear on both devices.
It's also worth checking whether your device's MAC address is blocked in your router settings. Some providers or network administrators use MAC address filtering. In this case, you'll need to whitelist the new device through the router's web interface.
Technology Comparison: Wi-Fi vs. Cable
Why is cable still relevant in the era of Wi-Fi 6 and 7? The answer lies in the physics of radio waves. Radio signals are subject to attenuation through walls, reflection from mirrors, and interference. Cables provide an isolated data transmission channel, protected from external influences.
Full duplex — an operating mode where data is transmitted simultaneously in both directions at full speed. A Wi-Fi device can't simultaneously receive and transmit data at the same frequency without loss; it switches very quickly, creating the illusion of simultaneous transmission. Cable eliminates this limitation.
Furthermore, a wired connection is more secure. To intercept data on a local network via a cable, an attacker needs physical access to the line. A Wi-Fi signal is broadcast over the air and can be intercepted remotely unless modern encryption protocols are used.
Does cable affect internet speed?
Yes, it does. If your plan allows for 500 Mbps speeds and your cable is old (Category 3 or 4) or damaged, your speed will drop to 100 Mbps or lower. Use Category 5e or higher cables for high-speed plans.
Can I use a USB to LAN adapter?
Yes, you can use USB adapters for laptops without an Ethernet port. These come in USB 2.0 (limited to 100 Mbps) and USB 3.0 (up to 1 Gbps and higher). Make sure you have the drivers for the adapter's chipset installed.
Should I turn off Wi-Fi when connecting a cable?
In most cases, there's no need to manually disable Wi-Fi. The operating system automatically prioritizes the cable. However, if you want to save battery life on your laptop or prevent any background network scanning, you can turn off Wi-Fi.
Why is the indicator light orange instead of green?
An orange LAN port LED often indicates a 10/100 Mbps connection speed, while a green one indicates 1 Gbps. This may indicate that the cable doesn't support higher speeds or that the router port is operating in legacy mode.