Objective: 

Students will continue preparing for proficiency in cyber security by reviewing networking fundamentals.

• Linux Journey
• Subnetting Module
• Subnetting.net

Topics Discussed:

1. Visit the Linux Journey website and scroll down to the “Networking Nomad” section. Click on the “Subnetting” item.
2. Subnetting is one of those things that you do with a calculator in the real world, but you’re not going to be allowed to take a calculator with you if you take a test like the Network+, CySA+ or CCNA exams, so you better learn how to do it on your own.
3. The “Subnetting” section of the Linux Journey website gives you a quick explanation of what subnetting is, and how it works. It also provides a subnet math cheat method that should get you through most of the problems you’ll encounter. However, if you want a more thorough understanding of how it works (and trust me, you do) visit the Subnetting.net link for further details.
4. The “How to Subnet” page at Subnetting.net provides a thorough overview of what subnetting is and how it works. If you’re too lazy to read the page (and I know most of you are) you can watch the Subnetting Tutorial video series, and get a full explanation of what subnetting is, how it works, and how to figure out subnets without the need for a calculator.
5.  With the materials provided here, you should be able to achieve a strong foundation in subnetting, which will allow you to handle a good portion of the questions on the CCNA and Network+ certification exams, as well as have a strong understanding of how packets figure out how to travel from one host to another, even when they’re on very different networks.