Wi-Fi is so commonplace that we barely notice it anymore. It hangs in the air around us like an invisible fog, connecting our devices to the Internet.It has become blazing fast with technologies like Wi-Fi 7adn we even take for granted that it can be accessed 30,000 feet in the air. It might as well be oxygen  - extremely boring untill you consider what life would look like without it. But once you look a little closer, this miraculous technology is far more captivating. Unluckily, the most fascinating things about Wi-Fi aren’t exactly taught outside of computer engineering schools.

The history of wi-Fi is as captivating as the tech itself, so it’s a sh

The Surprising Origins of Wi-Fi and What You Didn’t Know

The story of Wi-Fi’s invention is rarely mentioned, but it came about when a group of scientists needed a better way to send details to one another. The brand-name Wi-Fi came later,but the standard underpinning it was called ALOHAnet,developed starting in 1968 by a team under the leadership of Norman Abramson and franklin Kuo,two professors at Mānoa’s College of Engineering.

The University of Hawaiʻi is geographically unique, with multiple campuses spread out across various islands. This made sending data between those locations challenging, since telephone lines were the customary way of doing so.Abramson and his team thoght it was possible to create a radio network using random access protocols, which could transmit data packets more effectively. The main innovation of ALOHAnet was at-will scheduling. It did away with the need for complex packet scheduling by firing off the same packet multiple times until it was received.

So promising was this early wireless communications protocol that the Pentagon funded it through the Defense Advanced Research Projects agency (DARPA), which was known as ARPA at the time. The rest is history. The protocols that sprang forth from ALOHAnet are the reason you’re likely reading this right now. The technology proved so prosperous that it formed the backbone of not only Wi-Fi but also cell phones and Ethernet, among others.

Your Wi-Fi network can be used to track your movements

Some Wi-Fi Bands Are Better Than Others for Certain Tasks

As alluded to in the section above, there are multiple bands of Wi-Fi that are primarily differentiated by their wavelengths. Low-frequency Wi-Fi sends out waves that may be several inches from peak to peak, with a 2.4 GHz wave measuring about five inches. Higher frequencies produce smaller waves, with a 6 GHz frequency measuring about two inches. Shorter waves can transmit more data as they are more frequent, but shorter waves also have a harder time penetrating through walls and other barriers.

As of those trade-offs, not all Wi-Fi is created equal. If you really want to optimize your wireless network usage, you need to consider what frequency is best for each use case.For example, if you have a smart home setup where each of your light bulbs and other IoT devices is connected to the Wi-Fi, it’s often best to connect them to your 2.4 GHz band rather than a higher frequency channel. Conversely, your personal devices, such as your phone and laptop, can be better off using the highest frequency you have available. Things like the best Wi-Fi cameras may require experimentation.

This is as your smart home devices use relatively little data but are spread out across your home, whereas your laptop uses relatively large amounts of data. Longer waves from your 2.4 GHz band will have an easier time reaching your light bulbs and thermostats in every corner of your house, whereas your laptop will benefit from shorter waves that can transmit more data for bingeing Netflix. Moreover, by putting your smart lights on the lower frequency band, you free up bandwidth on the higher frequency bands for devices that need it more.

Evil Twin attacks: Protecting Yourself on public Wi-Fi

Public Wi-Fi is convenient, but it comes with risks. One of the most insidious is the “evil twin” attack. This happens when a hacker creates a fake Wi-fi hotspot that mimics a legitimate one. There’s frequently enough no way of telling whether a Wi-Fi signal is legitimate or not; all the hacker needs to do is create a hotspot with the same network name. These attacks work best on public, unsecured networks where large numbers of people are connecting, such as at airports, coffee shops, and so on. even if most people end up connecting to the legitimate network, the hacker only needs a few victims to connect to their evil twin.

That’s why it’s always a good idea to avoid connecting to networks that do not require a security key upon connection (rather than inside a web portal after the connection).Similar attacks can be carried out on secure networks, but that requires the hacker to be a bit more talented.

Key Takeaways

• Beware of Unsecured Networks: Avoid connecting to Wi-Fi networks that don’t require a password.
• Verify Network Names: Double-check the network name with a trusted source (e.g., a coffee shop employee).
• look for HTTPS: Ensure websites you visit use HTTPS (look for the padlock icon in your browser).
• Use a VPN: A virtual Private Network encrypts your internet traffic, adding an extra layer of security.

FAQ

What is an Evil Twin Attack?

An evil twin attack is a type of man-in-the-middle attack where a hacker creates a fake Wi-Fi hotspot that looks identical to a legitimate one, tricking users into connecting to it.

How can I protect myself?

Avoid unsecured networks, verify network names, use HTTPS websites, and consider using a VPN.

Are secure networks safe?

While more secure, even networks with passwords can be targeted, though it requires more skill from the attacker.