Explore the fundamentals of IPv6 in this comprehensive 48-minute talk by Thiago Macieira from Intel, presented at a Linux Foundation event. Delve into the history of IPv6, its differences from IPv4, and the challenges of widespread adoption. Learn about crucial concepts such as LinkLocal, Stateless Address, and Prefix Delegation. Discover how to write software that seamlessly supports both IPv4 and IPv6 using basic socket APIs. Gain insights into IPv6-specific features and their potential applications, as well as important security considerations for system administrators. Cover topics including Firewall Rules, Casting, Efficiency, URL handling, Socket Address management, and IPv6 in Low Power Networks. Benefit from Macieira's extensive experience in open-source projects and C++ development to enhance your understanding of this critical internet protocol evolution.