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In this tutorial, I'm going to teach you a basic understanding of wireless networks.

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So what is the wireless network?

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Is the network set up by using radio signal frequency to communicate with other computers just like

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cell phones and radios?

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Wireless networks makes life incredibly easy and give us such great mobility.

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It's also referred to as a Wi-Fi network or W LAN.

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In 1997, the Institute of Electrical and Electronics Engineers created the first double standard,

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which is a set of technologies for wireless communication.

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For an easy and they're standing, I made this simple table to show you a brief history of wireless

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standards.

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This table describes the Wi-Fi standards to help you understand the evolution of Wi-Fi technology.

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As you can see, there are five standards.

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What you only need to remember the N and the AC because these are the most common standards in use today.

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Next is wireless signals.

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Wireless signals are electromagnetic waves traveling through the air.

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They are important because they can transfer information like audio, video or voices, and so on.

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There are two types of Wi-Fi signal 2.4 gigahertz or lower frequency.

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This is the more common white flight technology in use today and the five gigahertz.

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Which is the higher frequency used by fewer devices and can achieve higher speeds.

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The range is also shorter.

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You will also need to know what is the wireless channel for the 2.4 gigahertz band.

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There are 14 channels.

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If you are building networks in the US, you can only use channels one 211.

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You can also use the five gigahertz frequency band, which is much wider and has more channels.

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These channels do not overlap, so you don't have to worry about picking non-standard channels like

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in the two point four band.

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Now that you know what channels and different bands are, you will need to know how to avoid radio interference.

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If you live in a populated area, your neighbor's wi fi could interfere with yours.

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So change the default wi fi channel and use one, six and 11.

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These three channels have no frequency overlap.

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Interference can also come from other electronics, such as microwaves, cordless phones, tablets and

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so on.

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The last topic I want to cover in this video is wireless antennas.

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Antennas are also key components of these radio communication systems.

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There are two types omnidirectional and directional an omnidirectional antennas sends a signal out equally

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in all direction.

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Unidirectional antenna sends a signal out in one direction.

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OK, so now that you have a basic theoretical understanding of wireless networks, we are ready to move

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on to my next video where I would show you useful wireless settings.

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So thanks for watching and I will see you next time.