"In 2014, a group of engineers at Plumgrid needed to find an innovative and cost-effective solution to handle network traffic in SDN environments. What they created was a landmark in the industry known as the extended Berkeley Packet Filter (or eBPF). This vital technology allows user-level code execution inside the Linux Kernel, transforming network traffic handling for SDN environments. Whether these engineers knew it or not, they had just revolutionized the Linux Kernel."