Chapter 12.3.1 - Data Link Layer (Layer 2): Foundations, Ethernet, Frames, MAC Addresses, and Switches (Part 1)

Chapter 12.3.2 - ARP, CAM Tables, VLANs, Broadcast Domains & Collision Domains

Chapter 12.3.3 - Layer 2 Troubleshooting, Linux Commands, AWS/Docker/Kubernetes Examples, Production Scenarios, Interview Questions, and Summary