As traditional, and even more modern, network architectures struggle to cope with more dynamic applications and services, another acronym has emerged as a possible answer to operators’ challenges. But ask ten different industry pundits what SDN (software defined networking) means and you will likely get ten different answers. At the time of writing, telecoms.com had just published a poll offering a variety of definitions, the clear leader of which was “other”—effectively meaning something else not on the list.