Wi-Fi vs. Ethernet: What's the Difference?

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Wi-Fi connects devices to a network using radio waves, usually in the 2.4 GHz and 5 GHz bands, while Ethernet connects them through a physical cable plugged into a router or switch. Ethernet gives steadier speed, lower latency and almost no interference; Wi-Fi gives the freedom to move around and to connect phones and laptops without any wires.

At a glance

	Wi-Fi	Ethernet
Connection medium	Radio waves in the 2.4, 5 and 6 GHz bands	Copper twisted-pair cable, e.g. Cat5e or Cat6
Mobility	Move freely within signal range	Device must stay plugged in
Latency	Higher and more variable	Low and consistent
Interference	Weakened by walls, distance and nearby networks	Largely immune; cable runs up to 100 m
Typical devices	Phones, laptops, tablets, smart speakers	Desktop PCs, game consoles, smart TVs, servers

Which should you use?

Wi-Fi

Wi-Fi is the practical choice for phones, tablets and laptops that move between rooms, and for homes where running cables through walls is difficult.

Ethernet

Ethernet suits a fixed device that needs a stable link, such as a desktop used for online gaming or video calls, or a smart TV streaming 4K video beside the router.

Frequently asked questions

Is Ethernet always faster than Wi-Fi?

Not always in raw speed, but usually in practice. A modern Wi-Fi router close by can match a gigabit cable, yet Wi-Fi speed falls with distance, walls and congestion, while a cable delivers the same speed and lower latency every time.

Does Ethernet reduce lag in online games?

Usually, yes. A wired link avoids radio interference and resent packets, so ping is lower and, more importantly, steadier. It cannot fix delay caused by your internet provider or by the distance to the game server.

What is the difference between 2.4 GHz and 5 GHz Wi-Fi?

2.4 GHz Wi-Fi travels farther and passes through walls better, but it is slower and more crowded. 5 GHz carries more data at higher speeds over a shorter range. Many routers broadcast both bands and let devices choose.