Building Packet Tracer Labs for CCNA Study: Network Protocol Interactions course. Building Packet Tracer Labs for CCNA Study: Network Protocol Interactions training course. Cisco Packet Tracer software is free network simulation software that allows learners to access Cisco network lab simulations anywhere they have access to a computer. Packet Tracer is a great tool for learners to practice configuring devices and also learn how to check for proper network operation and troubleshoot network problems. In this Building Packet Tracer Labs for CCNA Study: Network Protocol Interactions training course, you will learn how to build and use labs in the Cisco Packet Tracer network simulator to prepare for the Cisco CCNA certification exam. First, you will build labs to better understand the performance and configuration of Layer 2 technologies, including Etherchannel, HSRP, and Spanning Tree Protocol. Next, you will build labs where you practice creating and testing access control lists. Finally, you will practice implementing network address translation. At the end of the course, you will be able to build your own labs to practice networking technology and prepare for the concepts and objectives needed to successfully pass the Cisco CCNA exam.