In this chapter, we will be taking a look at different layer 2 switching technologies, which will be crucial to the CCNA 200-125 certification and real-world scenarios you run into. The concepts of what type of addresses switches learn, and how they learn them, is extremely important, especially when troubleshooting layer 2 issues. We all know that security is a big issue in today's network, so learning how to use switchport security is going to be an essential tool that you will learn in this chapter as well.
This chapter will also show you the complete administrative commands for including IP addresses you would need to configure on your switch, and how to manage them. Finally, please pay close attention to all the show commands that are done in the labs. It is a must know for certification and definitely real-world applications.
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