Wi-Fi

Wi-Fi helps our tools talk to each other.

It uses invisible waves in the air. These waves carry data to your tablet or phone.

This happens through a special box called a router. The waves travel through the air to reach your device. Walls can sometimes block these waves.

This makes the signal weaker. You can find Wi-Fi in homes and shops. It even works in big airports. Wi-Fi lets us use the web without any wires!

Wi-Fi helps our digital tools talk to each other.

It uses radio waves to send data through the air. This means you do not need wires to use the Internet.

These waves travel from a router to your device. A router is a box that provides the signal. You can find Wi-Fi in homes, hotels, and airports. Some places call these areas hotspots.

You might notice the signal gets weak near walls. Things like pillars or appliances can block the waves. This helps stop signals from messy overlapping.

To stay safe, a group called the Wi-Fi Alliance tests tools. They make sure different devices work well together. This is called interoperability. If a tool passes, it gets the Wi-Fi logo.

Every network has a special name. This name is called an SSID. It helps your phone find the right network. Newer versions of Wi-Fi are very fast. Some can reach speeds of one gigabit per second. Over 3.05 billion Wi-Fi devices are shipped every year.

Wi-Fi is a way for digital devices to talk to each other without wires.

It uses radio waves to move data through the air. This technology lets us connect to the Internet in many places. You might find it in your home or a small office. It is also common in public spots like coffee shops, hotels, and airports.

These public areas are often called hotspots. Because it is so popular, over 3.05 billion Wi-Fi devices are shipped every year.

How does this wireless connection actually work?

Devices send and receive information using radio waves. These waves travel through specific radio bands, like the UHF and SHF bands. Most systems use many different channels to carry data. Within a certain range, only one transmitter can use a channel at a time.

These waves work best when there is a clear line of sight. Obstacles like walls, pillars, or home appliances can make the signal weaker. This reduction in range actually helps prevent different networks from interfering with each other.

The history of Wi-Fi involves many smart people and different countries.

In 1985, the U.S. Federal Communications Commission released some radio bands for unlicensed use. In 1991, the NCR Corporation and AT&T created WaveLAN in the Netherlands. This was an early version of what we use today. Later, a team in Australia led by John O'Sullivan developed a prototype for a wireless network.

The CSIRO in Australia even filed a patent for Wi-Fi in 1992. Because of this, Australia, the United States, and the Netherlands all claim to have invented it.

Many important names and dates helped shape the technology we use.

Vic Hayes and Bruce Tuch helped design the first official 802.11 specifications. In 1997, the first version of the 802.11 protocol was released. A major breakthrough happened in 1999 when Apple used Wi-Fi in its iBook laptops. This was the first mass consumer product to offer this connection. The Wi-Fi Alliance was also formed in 1999 to manage the Wi-Fi trademark. This group includes more than 800 companies from all over the world.

You can see how Wi-Fi links to your everyday life through your gadgets.

Every network has a unique name called an SSID. This name helps your device find the right connection. You might use different versions of Wi-Fi depending on your hardware. Some newer versions, like Wi-Fi 6, are very fast. Some versions can even reach speeds of one gigabit per second.

Whether you are at home or traveling, Wi-Fi keeps your devices connected to the world.

Wi-Fi is a family of wireless network protocols used for local area networking.

These protocols allow digital devices to exchange data using radio waves. This technology provides internet access in homes, small offices, and public spaces. You can find Wi-Fi in coffee shops, hotels, libraries, and airports. It is one of the most widely used computer networks in the world. Because it is so common, over 3.05 billion Wi-Fi-enabled devices are shipped globally every year.

To understand how Wi-Fi works, we must look at radio waves. Devices use specific radio bands, such as the Ultra High Frequency (UHF) and Super High Frequency (SHF) bands. These bands are divided into many different channels.

A single transmitter can use a channel at one time within its range. Radio waves work best with a clear line-of-sight. Physical objects like walls, pillars, or appliances can reduce the signal range. However, these obstructions also help minimize interference between different networks in crowded areas. Newer generations of the standard even use the 6 gigahertz SHF band.

There are different ways for devices to organize themselves on a network. A service set is the collection of all devices associated with a specific network.

Each service set has a unique 32-byte identifier called an SSID. One type is a basic service set (BSS), which is a group of stations sharing a channel and SSID. These stations usually connect to the same access point. Devices can also operate in infrastructure mode. In this mode, all communications go through a central base station. Alternatively, devices can use ad hoc mode to communicate directly with each other without an access point.

To connect to a network, a computer needs a wireless network interface controller. The combination of the computer and this controller is called a station. Every station is identified by one or more MAC addresses. The technology is designed to work well with its wired sibling, Ethernet. While different versions of Wi-Fi use different radio technologies, they are often compatible. This allows devices to network with both wireless access points and wired devices. This connectivity is essential for modern internet access.

The history of Wi-Fi is a global story with many contributors. In 1985, the U.S. Federal Communications Commission released parts of the ISM bands for unlicensed use. These bands include the 2.4 GHz frequency used by microwave ovens. In 1991, the NCR Corporation and AT&T invented WaveLAN in Nieuwegein, Netherlands. This was a precursor to the modern 802.11 standard.

In Australia, a team at the CSIRO led by John O'Sullivan developed a wireless LAN prototype. They lodged a patent for Wi-Fi in 1992. Because of these developments, Australia, the United States, and the Netherlands all claim to have invented Wi-Fi.

Key individuals helped turn these inventions into a global standard. Vic Hayes and Bruce Tuch worked with the IEEE to design the initial 802.11a and 802.11b specifications. Vic Hayes served as the chair of IEEE 802.11 for ten years. Both men have been inducted into the Wi-Fi NOW Hall of Fame. A major commercial breakthrough occurred in 1999 when Apple adopted Wi-Fi for its iBook laptops.

This was the first mass consumer product to offer Wi-Fi connectivity. The Wi-Fi Alliance was also formed in 1999 to manage the trademark.

The Wi-Fi Alliance ensures that different products can work together through certification.

This process is called interoperability testing. If a product passes, it can use the official Wi-Fi logo. The certification requires following IEEE 802.11 radio standards and security standards like WPA and WPA2. The name "Wi-Fi" was actually created by a branding firm called Interbrand. They wanted a name catchier than the technical IEEE 802.11b designation. The name sounds similar to "Hi-Fi," which people associate with high quality.

Modern Wi-Fi continues to evolve with faster speeds and better efficiency. The Wi-Fi Alliance now uses generational numbering to simplify things for users. This includes Wi-Fi 4, Wi-Fi 5, and Wi-Fi 6.

These generations are designed to be backward compatible with older versions. Some versions can achieve speeds of one gigabit per second when running on suitable hardware. Whether it is a small room or many square kilometers, Wi-Fi connects our digital world.