WEBVTT

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 Hello and welcome to this course titled
 Wi-Fi fundamental principles.

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 I am your instructor Keith Bogart and
 if while you're watching this course

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 or after this course is done, if you have
 any questions that weren't answered

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 in this course or you have some you
 need some clarification on some of

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 the things I said, feel
 free to reach out to me.

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 I've provided you here in my direct
 email address, Twitter and LinkedIn

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 account. So I hope
 to hear from you.

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 So what will we be covering
 in this course?

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 Let's just briefly cover
 the course objectives.

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 So my goal is it says here is to help
 you gain familiarity with basic

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 Wi-Fi concepts, terminology
 and functionality.

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 So let's take a step back from
 that for just a moment.

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 Let's say you're somebody, you might be
 somebody who's worked in the course,

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 but pretty much everybody these days
 at some point in time is using or

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 has used a Wi-Fi network.

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 And maybe you've stopped at a certain
 point in time and thought, you know,

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 how does this actually work?

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 How am I actually getting on a network
 when I'm not physically connected

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 any cables or anything?

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 So this course is designed to give you
 a high level answer to that question.

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 So we're primarily going to look at
 the physical layer components of Wi

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-Fi. And what I mean by that is, how do
 we actually use radio waves, basically

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 the same waves that come into your
 radio in your car or your home when

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 you're listening to the radio, how do
 we use those same things to encode

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 information and get that information
 onto a network?

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 That's what we're going
 to be looking at.

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 So I'm going to provide you with an
 overview of radio frequencies and

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 how those can be used
 to encode data.

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 We'll also look at some possible problems
 with Wi-Fi signal propagation.

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 There's a lot of things that can mess
 up your Wi-Fi signal and either

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 prevent it from getting where it needs
 to go or maybe making it a lot

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 weaker than it should be or sometimes
 even sending it in a completely

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 wrong direction than you intended.


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 We'll look at some
 of those things.

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 And then lastly, we'll look at how to
 effectively implement Wi-Fi channels

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 when designing a wireless LAN.

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 So thank you in advance.

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 I hope this course is useful to
 you and let's dig right into it.