Why cables are still useful
Wi-Fi is convenient, and for phones, tablets and laptops it is usually the right choice. But a network cable offers things radio cannot easily match. Ethernet is a dedicated, private path between two devices. It is not affected by walls, microwaves, neighbors’ routers or how many other gadgets are online. That makes it more predictable.
The main advantages are:
- Stability. A cable connection does not fade, drop or fluctuate with the environment. Speed tests tend to be more consistent.
- Speed. A modern cable commonly carries gigabit speeds or more, and the full rate is usually available to that device alone.
- Low delay. Cables generally add less and steadier delay than wireless, which matters for some games and calls.
- Less load on Wi-Fi. Every device you move to a cable leaves more airtime for phones and other devices that must be wireless.
- No battery or placement problems. Nothing to charge, and nothing that depends on the signal at that corner of the room.
Devices that benefit most
Devices that stay in one place and use a lot of data are the best candidates:
- Desktop computers and workstations
- Games consoles, especially for online play
- Television and streaming devices, where streaming quality matters most
- Network storage and home storage devices that move large files
- Printers and media servers
- Work computers used for long video calls
- Wired access points or mesh nodes, which can use a cable as a stronger backbone
Devices that move, such as phones, are not candidates. Many smart home devices are wireless by design. A few, like hubs and some cameras, have a network port and may do better with it.
Wi-Fi and wired together
It is not either/or. Most homes use both: wired for stationary, demanding devices, wireless for everything else. A cable also makes Wi-Fi better indirectly, because connecting a nearby device to the router by cable frees capacity for the rest.
A common good use is a cable from the router to a distant location where you place a wired access point. That gives you strong coverage without the speed penalty of wireless repeating, as discussed in the notes on wifi extenders.
What you need
Cables. Ethernet cables are labeled by category, such as Cat5e, Cat6 and higher. For most homes, Cat5e or Cat6 handles gigabit speeds well over typical home distances. Higher categories matter mostly for faster speeds or very long runs. A single run is limited to roughly 100 meters (about 328 feet) for standard twisted-pair cabling, which is far more than most homes need.
Ports. Check how many wired ports your router has and their speed. If you need more, an unmanaged network switch is a simple, inexpensive way to add ports. A switch just splits one cable into several, and it usually needs no setup.
Connectors and jacks. Standard plugs are called RJ45. Wall jacks let you connect a patch cable at each end, which looks tidier than loose cables.
Choose a cable length that gives some slack. Pre-made cables of various lengths are easy to find, and most people never need to crimp their own connectors.
Running cables sensibly
You do not need to open walls to benefit.
- Short runs along edges. Flat cables can run under rugs or along baseboards and door frames.
- Cable clips and raceways. These hold cable neatly along walls and ceilings.
- Existing routes. If your home already has network or coax wiring in the walls, you may be able to use it. Check what the wiring actually is before assuming.
- Between floors. Closets, basements, attics and utility spaces can provide paths. Be careful around electrical wiring and follow local rules.
- Hire a professional for in-wall work. Drilling through walls or working in attics carries risks, including hitting hidden pipes or wiring, so consider an electrician or cabling installer for anything beyond simple surface runs.
Avoid sharp bends, tight staples and crushing cables under furniture. Keep them away from heavy power cables where practical, and label both ends so you know where each goes.
Powerline and alternatives
If a cable is not practical, powerline adapters use electrical wiring to carry data. They can work, but speed and reliability vary a lot with the wiring, so treat them as something to test, not to count on. Use a mesh system with a wired backbone where the layout allows.
A simple plan
- List the stationary devices that matter most: the desk, the TV, the console.
- Count the ports on the router and add a switch if needed.
- Start with the one device where Wi-Fi is worst, and run a cable there.
- Compare speed tests and stability before and after.
- Add more only if the improvement justifies the work.
If you plan any renovation or building work, adding network points then is much cheaper than later. Even a few spare outlets in key rooms can be a quiet investment, because wired connections stay useful across many generations of Wi-Fi.
Where it does not matter
For a small apartment with a good router and mostly phones and laptops, cabling may bring little. If a device works well on Wi-Fi, there is no need to change it. Use cables where they solve a real problem, not out of principle.