As we come out of the legacy hardware era in which each physical path was connected and designed to take traffic from one point to another, and where a packet had limited availability to reach from one device to another, SDN is ensuring that we have a network fabric for our data to reach between different sources and destinations.
A network fabric is a collection of different network devices connected to each other by a common controller ensuring that each component in the network is optimized to send traffic among each of the nodes. The underlying switch fabric, which is a physical switchboard with ports (like Ethernet, ATM, and DSL), is also controlled and programmed by a controller which can ensure (by creating ...
