June 14, 2026 · 9 min read
How to Tell Your Internet Connection Type: Fiber, Cable, DSL, 5G & Wi-Fi (2026)
How to identify whether you're on fiber, cable, DSL, satellite, fixed wireless, or mobile — using physical clues, your IP/ASN, and the browser — plus a speed and latency comparison of every connection type.
Your "connection type" actually has two layers: how your device reaches the router (Wi-Fi, Ethernet, cellular) and the line that reaches the internet (fiber, cable, DSL, satellite, fixed wireless, or mobile). The fastest way to tell is to combine three clues: the physical box your line plugs into, your IP's network registration (ASN), and what the browser reports. Our network type detector reads all three at once — the browser medium when available, your operator class from your IP, and a live round-trip measurement that works on every browser.
Quick answer: connection types at a glance
| Type | How to spot it | Typical download | Typical latency |
|---|---|---|---|
| Fiber (FTTH) | ONT box, thin fiber cable, symmetric speeds | 300 Mbps–8 Gbps | 1–10 ms |
| Cable (DOCSIS) | Coaxial screw-on connector, fast down / slow up | 100–1000 Mbps | 10–30 ms |
| DSL | Plugs into a phone jack (RJ11) | 10–100 Mbps | 20–50 ms |
| 5G / 4G home or mobile | SIM card, cellular modem or phone hotspot | 50–1000 Mbps | 20–60 ms |
| Fixed wireless | Antenna on roof aimed at a tower | 25–300 Mbps | 20–60 ms |
| Satellite (LEO) | Dish with clear sky view | 50–250 Mbps | 25–60 ms (LEO) |
| Satellite (geostationary) | Dish, older providers | 10–100 Mbps | 600+ ms |
Want your own readout right now? Open the network type detector — it labels your medium, operator class, and measured latency in seconds.
The 3 clues that reveal your connection type
1. The physical box (most reliable)
The hardware where your line enters the home tells you the most:
- Fiber terminates at an ONT with a slim fiber strand — and usually gives matching upload and download speeds.
- Cable uses a coaxial connector (the round, screw-on TV cable) and is asymmetric — big download, small upload.
- DSL plugs into a telephone jack.
- Mobile / 5G home has a SIM card.
- Satellite has a dish.
2. Your IP and ASN (works on every device)
Every public IP belongs to an ASN (autonomous system number) registered to an ISP or carrier. That registration reveals the operator and a likely class — residential ISP, mobile carrier, hosting/VPN, education, or government. This is how a site identifies your network even on Firefox or Safari. See exactly what yours exposes with What Is My ISP and What Is My IP.
3. What the browser reports
Chromium browsers expose a type field (wifi / cellular / ethernet) and an effectiveType speed bucket via the Network Information API. It's a useful hint, but deliberately rounded and missing in Firefox and Safari — so never rely on it alone. For the full technical breakdown, read What Is My Network Type: How Browsers Detect Wi-Fi vs Cellular.
Wi-Fi is not the whole story
This trips everyone up: Wi-Fi is just the last hop to your router. Behind that router could be fiber, cable, DSL, 5G, or satellite. A congested Wi-Fi channel can make a gigabit fiber line feel like DSL — which is why your browser may show type: wifi but an effectiveType of 3g. To separate the wireless hop from the line behind it:
- Test next to the router, then across the house — a big drop points to Wi-Fi, not your plan.
- Compare to a wired device if you have one.
- Run a real throughput test on each.
Speed vs latency by connection type
Bandwidth and responsiveness are different axes, and connection types rank differently on each:
| If you care about… | Best types | Worst types |
|---|---|---|
| Raw download speed | Fiber, cable, 5G | DSL, geostationary satellite |
| Low latency (gaming, calls) | Fiber, cable | Geostationary satellite |
| Upload speed | Fiber (symmetric) | Cable, most DSL |
| Availability rural | Satellite, fixed wireless, 5G | Fiber, cable |
For what the numbers should look like, see What Is a Good Ping? and How to Read Your Speed Test Results.
How to confirm it in 30 seconds
- Look at the box your internet plugs into (ONT, coax, phone jack, dish, SIM).
- Check your operator class with the network type detector — it reads your IP's ASN.
- Measure latency and speed. Very low latency with symmetric speed → fiber. Fast down, slow up → cable. Higher latency on a SIM → mobile. 600 ms+ → geostationary satellite.
- Separate Wi-Fi from the line by testing near vs far from the router.
Ready to see what your connection actually is? Run the network type detector for your medium, operator, and live latency — then pair it with the Internet Speed Test for real throughput and the latency tool for round-trip time.