Shopping for internet can feel like reading a foreign language. "Symmetric," "latency," "ONT," "Wi-Fi 7." I've watched plenty of folks nod along while a salesperson rattled off terms, then call me afterward to ask what any of it meant. So here's my plain-English glossary. Bookmark it, and come back whenever a word trips you up.
Speed and performance
Bandwidth How much data your connection can carry at once. Think of it as the width of a road. More bandwidth means more lanes, so more things can happen at the same time without slowing each other down.
Download Data coming to you: shows, web pages, game updates, email attachments. Most plan ads lead with download speed.
Upload Data you send out: your face and voice on a video call, photo backups, files sent to work, videos you post. Upload is often the overlooked number, and it matters a lot for anyone who works from home. My guide How much internet speed does your household actually need? explains why.
Mbps (megabits per second) The most common way internet speed is measured. Higher numbers mean more data can move each second.
Gbps (gigabits per second) One gigabit per second equals 1,000 megabits per second. You'll see Gbps used for faster connections, sometimes called "gig" speeds.
Symmetric When upload and download speeds are the same. Many fiber connections are symmetric, while many other connection types offer much less upload than download.
Asymmetric When upload and download speeds are different, usually with much less upload. Fine for streaming, but it can be a bottleneck for video calls and backups.
Latency The delay for data to travel to a server and back, measured in milliseconds (ms). Lower is better. It's what makes games and video calls feel responsive or sluggish.
Ping The test that measures latency. People often use "ping" and "latency" to mean the same thing.
Jitter How much your latency bounces around. Steady latency feels smooth. Jumpy latency causes choppy calls and "rubber-banding" in games. My guide Gaming and lag in plain English goes deeper.
Buffering When a video pauses to load more. Usually a sign that your connection or Wi-Fi can't keep up at that moment.
Speed test A quick online check of your download, upload, and latency. For the truest result, run it on a device plugged into your router with a cable, then compare it with Wi-Fi.
Busy hour (peak time) The time of day when the most people are online, usually evenings. Some connection types slow down at busy times when lots of neighbors share the same capacity.
Equipment
Modem The device that connects your home to your provider's network over a cable, phone, or other line. It translates the signal into internet your router can use.
ONT (optical network terminal) The fiber version of a modem. It's the small box, usually on a wall inside your home, where the fiber line ends and your internet "comes out." My guide What to expect on fiber install day shows where it typically goes.
Router The device that creates your Wi-Fi network and shares your internet with all your devices. Some routers are combined with a modem in one box.
Gateway A single device that combines a modem (or ONT) and a router.
Ethernet The standard cable used to plug devices into your router for a wired connection. Wired is usually steadier than Wi-Fi.
Port A spot on your router or device where you plug in a cable.
Mesh Wi-Fi A system of two or more units placed around your home that work together as one Wi-Fi network. Great for bigger or multi-level homes. See Mesh Wi-Fi vs. extenders.
Extender (repeater, booster) A single device that picks up your Wi-Fi signal and rebroadcasts it farther. Works best for one stubborn room.
Firmware The built-in software that runs your router. Updates fix bugs and patch security holes.
Wi-Fi terms
Wi-Fi Wireless internet inside your home, created by your router. Wi-Fi speed and your internet plan's speed are two different things.
Wi-Fi 6 A newer generation of Wi-Fi technology, built to handle more devices at once more efficiently than older generations.
Wi-Fi 6E Wi-Fi 6 with access to an extra radio band (6 GHz), which can mean less crowding in busy areas. Your devices need to support it to use it.
Wi-Fi 7 The newest generation of Wi-Fi, designed for faster speeds, lower latency, and busier homes. Both your router and your devices need to support it to get the full benefit.
Band (2.4 GHz, 5 GHz, 6 GHz) The radio "lanes" Wi-Fi uses. 2.4 GHz reaches farther but is slower and more crowded. 5 GHz and 6 GHz are faster but don't travel as far through walls.
Dead zone A spot in your home where Wi-Fi is weak or doesn't reach. My guide Better Wi-Fi at home: 7 simple fixes can help.
Guest network A separate Wi-Fi network for visitors and smart devices, kept apart from your main one.
SSID The name of your Wi-Fi network, the one you pick from the list on your phone.
Connection types
Fiber Internet carried as light through thin glass strands. Known for strong upload and steady performance at busy times.
Cable Internet carried over the same type of coaxial line used for cable TV. Often offers much less upload than download.
DSL Internet carried over telephone lines. Performance depends a lot on how far you are from the provider's equipment.
5G Home (fixed wireless) Home internet delivered over a cellular network to a receiver in your home. Performance can vary with signal and how busy the network is.
Satellite Internet delivered from satellites in space. Available almost anywhere, but signals travel far, which can add latency.
My compare page lays these out side by side.
Plans and fine print
Data cap A limit on how much data you can use in a month. Going over may mean slower speeds or extra charges, depending on the plan. Always ask.
Contract An agreement to keep service for a set time. Ask whether there's a fee to end it early.
Early termination fee A charge for ending a contract before it's up.
Intro period A starting period when terms may differ from later ones. Ask what changes when it ends.
Equipment fee A charge for renting a modem, router, or other equipment. Ask what's included.
FAQ
What's the difference between a modem and a router? A modem (or ONT, for fiber) brings internet into your home. A router shares that internet with your devices and creates your Wi-Fi. Some boxes do both.
Is Wi-Fi the same as internet? No. Internet is the service coming into your home. Wi-Fi is the wireless network inside your home that shares it. A great connection can still feel slow on weak Wi-Fi.
What does "symmetric" mean on a fiber plan? It means upload and download speeds are the same, which helps with video calls, backups, and sending big files.
Came across a term I didn't cover? Call or text me at 763-888-8211. I'm happy to explain it in plain English, no pressure.
— Dan Amundson, Fiber Is Better
Check what's available at your address
Enter your ZIP code and I'll show you the fiber options where you live. Check your ZIP →