From the diffusion equation it can be shown that the distance a diffusing particle moves in a medium is proportional to the root of the time the system has been diffusing for, where the proportionality constant is the root of the diffusion constant. The above relation, although cosmetically different reveals similar physics, where "N" is simply the number of steps moved (is loosely connected with time) and "b" is the characteristic step length. As a consequence we can consider diffusion as a random walk process.