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Название :  That's How Wi-Fi Actually Works
Продолжительность :   626
Пользователь :  BRIGHT SIDE
Дата публикации :   2019-06-06
Просмотры :   406,239
Понравилось :   12
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Remember the days when your internet was connected through the phone line? Oh, that sound of dial-up! We’ve come a long way since then, and chances are that you’re watching this video through Wi-Fi right now. So how did we get here anyway?

In the 1980s, personal computers had begun to enter our lives for good. But at that time, they were connected to the internet through the infamous Ethernet cables. Maybe scientists were getting tired of tripping over all those cables? They decided they wanted to start sending data using radio signals. However, those early attempts were unsuccessful. What scientists didn’t know at the time was that the problem had been solved a decade before PCs were even invented!

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TIMESTAMPS:
The important invention of one Hollywood actress 0:28
The father of Wi-Fi 1:45
Wi-Fi. What does it mean anyway? 3:05
This is all via radio waves 3:57
What reduces the speed of the Internet 5:34
How your photos (and other things) reach your friend 6:35
Is Wi-Fi bad for our health? 7:48
What can block your Wi-Fi signal 8:50

#wifi #internet #technology

Music by Epidemic Sound epidemicsound

SUMMARY:
- The roots of Wi-Fi go way back to the 1940. That’s when a popular Hollywood actress and inventor by the name of Hedy Lamarr came up with a way to prevent radio signals from being tampered with.
- Early attempts were unsuccessful since it all bounced back on walls, furniture, and pretty much anything that stood in a computer’s way.
- It all started back in the 1970s, with electrical engineer Dr. John O’Sullivan, a.k.a. “the father of Wi-Fi.” At the time, he and his team were trying to detect radio signals from distant black holes in space, and they came up with complex equations called Fast Fourier transforms.
- After a lot of experimentation, they took their fancy Fast Fourier transforms, added them in the mixture with the data equations they’d previously tried to send over radio, and thus they formed the basis for the Wi-Fi we all know and love today!
- Later in 1996, they further developed their original key patent, and by 1997 they finally cracked the code and came up with the first version of the 802.11 protocol.
- Wi-fi is a pun for the word Hi-Fi, which means “high fidelity” – a technical term used for high-quality audio technology.
- The frequencies Wi-Fi routers use are 2.4 or 5 Gigahertz per second, which is why data gets transferred so quickly to your phone.
- If you have baby monitors, garage doors, microwaves, cordless phones, and wireless cameras, they can interfere with your Wi-Fi.
- When you turn your phone or computer on and get on the internet, all the information you’d like to access is broken down into binary code. And when you access something through Wi-Fi, then that binary code is transformed into wave frequencies.
- Is Wi-Fi dangerous? Well, the short answer is no. Wi-Fi works at extremely low voltages. Even at short distances, Wi-Fi is just part of the household "smog" that’s generated by TV and radio signals.
- A typical router works at about 100 feet in every direction. As for what can block it, that’s pretty much anything that conducts electricity, like metal, water, mirrors, and even our bodies since they mainly consist of water.

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