[MUSIC] Hello, my name is Tyler McMinn with Aruba, a Hewlett Packard Enterprise company, and this is the Aruba mobility essentials course. This series of videos which is going to be chopped up into smaller five, 10 minute videos is going to take on different topics throughout the series, in order to explain the wireless technology that we work with every day at home, at work, as we travel. The second part of this is going to focus on wireless networking architecture, what are the components that go into your typical wireless deployment. So at the end of this video, there will be an opportunity or this series of videos to take a quick Short quiz, test your own knowledge, and even earn a certificate from Aruba, kind of letting you know, like letting everybody know, hey you made it through, you were able to digest some of these information which is good. So the way that we're going to break this down, in part one at least, where we focus on the technology piece of it We're going to look at an overview of comparing wired versus wireless. We're going to take a peek at the different wireless LAN organizations or the organizations that go into deploying a wireless local area network. We're going to tie this in as well with RF communications, how the radio propagation occurs, what is modulation? What are channels? What are power levels? What signal and noise ratio? How the math works and coming up with a received signal, strength, indicator, and how us as, wireless engineers and administrators would want to be able to describe what a good signal is versus a bad signal. And even some of the important concepts that kind of go into planning a proper design in your wireless environment. And so it's fun to take some of these concepts apply them at your home, as I mentioned, see how they work, because we just simply scale a lot of that when it gets into an enterprise deployment. We'll take a look at some of the 802.11 standards, and we'll wrap up on just a quick overview on data rates for this first part as I had said. The second series of videos that's going to follow, is going to focus more on the design aspect of it. What are the components that make up a wireless LAN in a typical small business or moderately sized organization, such as a hotel, or hospitals, something like that. This concept of wireless LAN roaming your laptop actually going from one access point as it travels along the hall, or to another access point to another access point. How does this actually occur? What technology is involved? It seems seamless to us on the wireless device on the station or on the client device, and that's by intention, but there is a bit that is going on behind the scenes, in order to allow that handoff to occur within 10 to 15 milliseconds. So it's almost unnoticed by us the user, we'll finish up with some an overview on the WLAN architecture. Looking at security and authentication controlling who has access to what components of wireless, how do we lock down wireless even though it's exposed, and being broadcasted the way it is physically. We want to make sure that we're using good cryptographically strong authentication methods, and encryption methods to protect Our corporate assets, our corporate network. So where do we use wireless LANs? What's the wireless LAN use case? And then finally, a little bit of redundancy there. Again, like with these additional APs, one thing they bring to the table here is redundancy. If one of these APS goes down, then the other APs can boost their signal in order to overlap their coverage and compensate. So I hope you guys are as excited as I am about jumping in on these topics and really just breaking it down into the kind of the simplest parts that I can to be able to explain this to anybody. This class is designed to be freely available to everybody with zero prerequisites required. And of course, if you have experience with wireless or you have some other networking experience, I hope you find that these series of videos are useful in explaining key concepts in a slightly deeper dive than you may expect, but still being approachable. So, I hope you guys have enjoyed this little intro, my name is Tyler. I'm going to go ahead and stop the video here. And in the next one, we're going to jump into that wired versus wireless LAN concept, really kind of breaking down what are the key differences. So we have a good starting point. Thank you again, I'll see you guys in the next video.