This course has been discontinued
Common Layer 2 Attacks is an exam objective in the CCNA Security certification exam. In preparation for this exam, you are going to cover concepts like configuring VLANs, trunking, securing switches, and optimizing spanning tree. You will begin by taking a look at VLANs, or Virtual Local Area Networks. After taking some time to define VLANs and describe their purpose, you will find discussions on VTP, which is the VLAN Trunking Protocol, and then focus on trunking itself. You will also learn about InterVLAN routing and port security on switches. Learn how to identify security implementations that should be considered with designing a network, such as enable password access, authentication servers like RADIUS and TACACS+, and disabling IOS services that come standard on Cisco devices. Finally, you will learn the definition of spanning tree, and then you will look at ways in which you can implement and optimize it. Gain an in-depth understanding of these topics to determine how to best respond to layer 2 attacks.