Ethernet or Wi-Fi: which should you choose?
Nicolas,
Are you torn between plugging in an Ethernet cable or staying on Wi-Fi? Both technologies let you connect to the internet, but they are not equal in every context. Speed, stability, latency, security, ease of installation: each factor can tip the balance depending on your use case. Here is a full comparison to help you make the right choice.
Ethernet vs Wi-Fi: the core differences
Ethernet is a wired connection that links your device directly to your router or modem via an RJ45 cable. Wi-Fi is a wireless connection that transmits data via radio waves.
Both connection types use the same internet provided by your ISP, but the way data travels between your device and the router is fundamentally different — and that difference has real performance consequences.
1. Connection speed
In theory, recent Wi-Fi standards (Wi-Fi 6, Wi-Fi 6E) can reach very high speeds. In practice, Wi-Fi speed depends on many factors: distance from the router, physical obstacles, interference from other devices and network congestion.
Ethernet, on the other hand, delivers stable and predictable speed:
- A Cat5e cable supports up to 1 Gbps
- A Cat6 or Cat6a cable supports up to 10 Gbps
- Speed is not affected by distance or obstacles
Good to know: if your measured Wi-Fi speed is lower than what you pay for with your ISP, try plugging an Ethernet cable directly into your router. If the speed increases significantly, Wi-Fi is the limiting factor — not your subscription.
2. Latency
Latency (or ping) measures the time data takes to travel from your device to a remote server and back. It is expressed in milliseconds (ms).
- Ethernet: typical latency of 1 to 5 ms on a local network
- Wi-Fi: typical latency of 10 to 50 ms, variable depending on the environment
This difference is especially critical for:
- Competitive online gaming (FPS, MOBA, battle royale)
- Video calls and professional video conferencing
- Trading or real-time financial applications
3. Stability and reliability
This is one of the most notable advantages of Ethernet. A wired connection is not subject to radio interference, channel saturation or signal variations caused by the environment.
Wi-Fi, on the other hand, can be disrupted by:
- Thick walls, concrete slabs or metal partitions
- Household appliances (microwaves, cordless phones)
- Neighbours' Wi-Fi networks on the same channel
- The number of devices connected simultaneously
4. Security
Ethernet is inherently more secure: intercepting a wired communication requires physical access to the cable or network. Wi-Fi, broadcasting radio waves through the air, is more exposed to eavesdropping or intrusion attempts, even though modern encryption protocols (WPA3) significantly reduce this risk.
- Ethernet: physical access required to intercept data
- Wi-Fi: wireless attack exposure reduced by WPA2/WPA3, but higher risk than wired
5. Ease of installation and mobility
This is where Wi-Fi has the upper hand. It requires no cabling and allows devices to connect anywhere within the router's coverage area.
- Wi-Fi: instant setup, full mobility, ideal for smartphones, tablets and portable devices
- Ethernet: requires a cable and an RJ45 port on the device — many ultrabooks do not have one
Ethernet vs Wi-Fi comparison
| Criterion | Ethernet | Wi-Fi |
|---|---|---|
| Speed | Very high and stable | High but variable |
| Latency | Very low (1–5 ms) | Moderate (10–50 ms) |
| Stability | Excellent | Variable by environment |
| Security | Very high | Good (with WPA3) |
| Installation | Cabling required | Wireless, instant |
| Mobility | None | Full |
| Compatibility | RJ45 port required | Universal |
When to choose Ethernet?
- Desktop or gaming PC
- Connected gaming console (PS5, Xbox)
- Smart TV or 4K/8K set-top box
- NAS or home server
- Remote work with intensive video conferencing
- Regular streaming or large file downloads
When to choose Wi-Fi?
- Smartphones, tablets and portable devices
- Laptops used around the home
- Connected devices (speakers, smart bulbs, thermostats)
- Rooms far from the router with no cabling option
- Light office use or occasional web browsing
Good to know: the quality of your connection — whether Ethernet or Wi-Fi — only affects your local network. Your public IP address is assigned by your ISP regardless of the connection type used by your devices. You can check your public IP address and associated information directly from our online tool.