A Simple Example
Consider a 2×2 banyan switch, which requires (2/2) log2 2 = 1 switching element. This switch takes two inputs, numbered 0 and 1, and two outputs, numbered 0 and 1. Every packet that comes in has a header that contains one bit indicating what its destination is (either 0 or 1). If the switch reads the bit and it has value 0, it sends the packet to its higher output (which is 0 in this case), and to its lower output if the routing bit is one. By connecting these switching elements in series and parallel it is possible therefore, to route packets in more complicated ways depending on the desired routes to establish.
Read more about this topic: Banyan Switch
Famous quotes containing the word simple:
“Here we are, we’re alone in the universe, there’s no God, it just seems that it all began by something as simple as sunlight striking on a piece of rock. And here we are. We’ve only got ourselves. Somehow, we’ve just got to make a go of it. We’ve only ourselves.”
—John Osborne (b. 1929)