What is Wi-Fi?
"Wi-Fi" is the friendly common name for the IEEE 802.11 series of technical protocols commonly used for creating wireless local area networks.
Instead of using wires, a Wi-Fi access point creates a local network by broadcasting over pre-defined unlicensed channels, hosting a network that nearby devices can connect to if they know the network's name and password.
Wi-Fi is primarily a short-range local wireless networking technology, and the Wi-Fi Alliance owns the trademark to "Wi-Fi" - only allowing certified compatible and interoperable devices to claim Wi-Fi compatibility.
While it is possible to have Wi-Fi networks that are NOT connected to the Internet, it is quite common for a Wi-Fi router to not only connect devices to each other but also share an Internet connection with them.
The internet source might be cable, DSL, satellite, cellular or even another Wi-Fi network.
But Wi-Fi itself is NOT the internet, it is just a networking protocol - a wireless version of an Ethernet cable.
The wireless signal create by a Wi-Fi access point is relatively short range and meant to only cover a limited area - typically only a few hundred feet.
All modern laptops, smartphones, tablets, streaming devices, many TVs and most other internet connected devices have Wi-Fi receiving ability - and can connect to an access point.
And most routers and cellular enabled mobile devices have the ability to create their own private local area wireless network - sharing their upstream connection.
Mobile travelers like RVers and cruisers may encounter Wi-Fi in their travels in multiple forms - both in their own local area networking, shared public access points and borrowing bandwidth from friends they might visit.
This guide will help explain just what Wi-Fi is, and the many forms it comes in.
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Wi-Fi is Not the Internet
How often have your heard (or even said yourself)...
I need some Wi-Fi!
... When what was really meant was: 'I need to get online'?
Because Wi-Fi technology is often used as a way to deliver internet access to computers and other devices, it has become a common association.
But technically, Wi-Fi does not mean internet access. It's simply a wireless technology used for connecting devices together.
And this can cause a great deal of confusion, especially for mobile travelers who might be utilizing different forms of wireless technology to get their internet access.
By far the two most common ways that RVers and cruisers will be able to get online is via either a cellular data connection or via an existing Wi-Fi network (such as you might find at a campground, marina or cafe).
And while they are both wireless signals - they are different.
And these differences matter when you're considering your mobile internet setup - as each requires different strategies for getting the best signal and performance.
A Wi-Fi extender will not help you get a better cellular signal, and a cellular booster will not help you with getting a better signal from your campground's or marina's Wi-Fi network.
The radios involved, frequency bands used, and technologies underlying Wi-Fi and cellular data are different.
How Cellular Is Different
There's a lot of confusion between Wi-Fi and cellular, the two most popular mobile internet connections.
They are both wireless technologies, and commonly a Wi-Fi signal is used to share a cellular connection to other devices.
Cellular is a longer range wireless technology than Wi-Fi. Cellular data signals involve the same basic technology used for cellular phone calls and text messaging.
All smartphones, some tablets, some newer cars, a very few laptops, and some routers have cellular data capabilities built in.
When using cellular data you are accessing the internet via a cell tower that might be within sight or perhaps as far as 20 miles away. That cellular tower in turn usually has a very high speed connection to the internet itself.
Using cellular data requires you to have a data plan with a cellular carrier such as Verizon, AT&T, or T-Mobile - or one of their many resellers.
Video Overview: Wi-Fi vs Cellular
Where Cellular & Wi-Fi Collide: Hotspots & Cellular Routers
Merging cellular and Wi-Fi are smartphones, mobile hotspots, and mobile routers with cellular modems built-in.
These are cellular receiving devices that also create a personal Wi-Fi hotspot to share the cellular data connection with other devices.
A smartphone or tablet can usually create a personal hotspot that functions to share its connection, or a small dedicated device called a MiFi, Mobile Hotspot, or Jetpack (they’re all the same thing) can do the job too.
For more robust needs, there are also cellular embedded routers that offer more pro-level networking needs - they're like Jetpacks on steroids.
But in reality, any device that can create a Wi-Fi hotspot is technically a router - including your smartphone.
For more on Cellular Data:
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Wi-Fi Frequencies & Channels
Explaining the differences between 2.4, 5 and 6 Ghz Wi-Fi channels, and how to effectively utilize each.
Understanding the alphabet soup of different generations of 802.11 standards, including Wi-Fi 6, 6E, WiGig and HaLow.
How to best optimize Wi-Fi signals by knowing what things can inhibit their optimal performance.
Wi-Fi as WAN and LAN
You might use Wi-Fi in two different ways in your travels - as your local area network and as your internet source. This section goes over the different considerations for each.
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