In this course, you'll learn about the VLAN Trunking Protocol, the management of VLANs on the network, and the potential dangers of this protocol. Next, you'll discover how to troubleshoot 802.1Q in your environment. You'll discover troubleshooting techniques to help ensure smooth operation at Layer 2 in your infrastructure. Finally, you'll examine troubleshooting both Layer 2 and Layer 3 EtherChannels, as well as those that are statically and dynamically created. This course can be used in preparation for the 350-401: Implementing and Operating Cisco Enterprise Network Core Technologies certification exam.