A lot of people can clone a TCP/IP alike stack + a router by themselves in less than a year. Assuming one only needs to clone the product function, "route packe

A lot of people can clone a TCP/IP alike stack + a router by themselves in less than a year. Assuming one only needs to clone the product function, "route packets over a network", not all the concrete implementation details. The daunting part is being compatible with all the written sometimes unwritten, corner cases of the actual TCP/IP spec. By the proposed measure, the Internet is not innovation.