Lesson 1 of31
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About the course

Christophe September 6, 2021

Hi and welcome to Cybr’s Networking Fundamentals course!

Let’s take a couple of minutes to explain the syllabus and what we’ll be covering.

Introduction

You are currently in the Introduction section of the course, which contains this lesson and a lesson about the author and narrator of the course.

Let’s talk OSI and TCP/IP

In the following section, we talk about the fundamental models that shaped the Internet as it is today: The OSI Model and the TCP/IP stack. These models are made up of layers which we explore one by one with examples.

We’ll then explain how data gets prepared to travel through those different layers in order to reach its destination, and then how that data gets unpacked once it reaches its destination in order to be processed by the receiving device.

That section gives us a solid foundation to then extract each and every layer from layers 1 through 4 in much more detail.

Layers 1 and 2

We’ll talk about wifi versus wired connections and devices in the Layer 1 section of the course. We’ll talk about something called MAC addresses and the devices that operate in Layer 2. We’ll go through examples of how those devices are able to send out information and find the proper recipient of that information.

Layer 3

Next, we move on to Layer 3. A lot goes on in this layer. This is where we will learn about IP addresses, routers, how routers route information between devices or even entire networks, and more.

Layer 4

Then, we have a section dedicated to Layer 4, where we talk about different transmission protocols, ports, and more.

Layers 5, 6, and 7

After that, we briefly go over layers 5, 6, and 7. Since these layers are more closely related to applications as compared to networking, we won’t go into as much detail in this course, which is why that section is shorter.

Conclusion

Finally, we wrap up with a conclusion section that includes additional resources you will want to check out.

Networking is easily one of the most commonly recommended topics to learn for anyone interested in being in an IT career, and so it’s arguably one of the most important skills to build when starting out.

Let’s get started

So that’s it – just wanted to give you a brief overview of what you can expect to get from the course, and why it makes sense to start from the top and work your way down.

If you have any questions or need any help, please don’t hesitate to reach out on the Cybr Forums or Discord, and either me or the course’s co-author – Alden – will be able to help!

Thanks, and see you in the next lesson!

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