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In this section of the course,

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we're going to discuss wireless networks.

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Now, wireless networks are great,

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because they extend our physical network

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into the wireless domain.

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This allows our users to roam wherever they want

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inside of a coverage area.

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If you think about college, for instance,

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you might have had the entire campus

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with numerous buildings, the outdoor spaces,

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and everywhere being connected

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by this wireless network.

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You could walk out to a picnic table,

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take out your laptop,

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and gain access to the network

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if you had full wireless coverage there.

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Now, the popularity of wireless networks

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keeps increasing over and over again.

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Back in the late 1990s,

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there were just a few places

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that had wireless networks,

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but these days,

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we come to expect wireless networks

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pretty much everywhere we go.

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Heck, we even have 'em

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on cruise ships and airplanes,

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as we travel across the globe.

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Now, anytime you go

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to a coffee shop or a restaurant,

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you can usually expect

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to be able to pull out your phone,

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and find a wireless network that you can use.

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These are convenient to use,

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and they expand your network throughout a room,

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a floor, a building,

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or an entire outdoor space.

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Wireless networks are definitely here to stay.

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So in this section of the course,

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we'll be discussing wireless networks.

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We're going to be focused mostly

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on domain one, networking concepts,

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and domain two, network implementation.

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We'll briefly cover objective 1.5,

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that states you must be able to compare and contrast

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transmission media and transceivers,

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but we'll really be spending a lot more time

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in this section exploring objective 2.3.

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And objective 2.3 states,

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that given a scenario,

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you must be able to select and configure

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wireless devices and technologies.

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Now first, we're going to be looking

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at the different types of wireless networks

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that you may come across,

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including networks that rely on ad hoc

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and infrastructure modes.

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Then we'll discuss the types of wireless antennas

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that you're going to use with your wireless networks,

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including omnidirectional, unidirectional,

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and Yagi antennas.

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Next, we're going to teach you how to identify

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different types of antennas by sight,

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as you look at the different types of antennas,

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and their use in the real world.

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After that, we're going to explore

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the different wireless frequencies

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used in our WiFi networks,

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including 2.4,

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five, and six gigahertz frequency bands.

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Then we're going to be discussing

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the different 802.11 standards

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that are used to define the different types of WiFi,

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including wireless a, b, g, ac,

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and ax-based networks.

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Next, we'll explore wireless security

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as we dive into the concept of open networks,

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and we'll take a look at encrypted networks

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like WEP, WPA, WPA2, and WPA3,

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as well as how WPS can be used

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to simplify the configuration

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of our wireless network devices

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and our wireless clients.

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After that, we'll perform a demonstration

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of how wireless security can be configured

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in a simple small office/home office wireless network.

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And then you're going to see what happens

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when wireless security fails,

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because I'm going to demonstrate

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how a penetration tester or attacker

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may try to crack your WiFi password,

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and gain access to your network

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using a tool called Aircrack-ng.

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Next, we'll cover the concept of a captive portal,

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and we'll discuss the different

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use cases and benefits

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of using these type of captive portals.

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Finally, we'll take a short quiz

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to see what you learned

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during this section of the course,

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and review the answers

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to ensure you know why the right answers were right,

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and the wrong answers were wrong.

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So if you're ready,

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let's get started

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with our coverage of wireless networks

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in this section of the course.