This unique Linux networking tutorial/reference by experts provides readers with a practical overview and understanding of the implementation of networking protocols in the Linux kernel. The book shows how networking behavior and protocols can be implemented within the Linux operating system. The book provides an introduction to the Linux kernel, mainly focusing on the upcoming kernel version 2.4 but also valid for version 2.2 kernels. The organization of the book follows the TCP/IP layering model, beginning with the kernel's network device drivers, continuing with link-layer protocols such as PPP, and finally giving a description of all core protocols of the TCP/IP protocol family. Additional supplementary protocols such as RSVP, IP Security, and Mobile IP are also covered.