Is micro-segmentation the key to modern security?

Is micro-segmentation the key to modern security?
Micro-segmentation is a word you’ll see a lot these days in press releases from companies pushing their SDN product as THE defense against modern cyber attacks, but what is it and is it really a cyber ‘silver bullet’? Traditionally, datacenter security was almost entirely concerned with securing the perimeter leaving a ‘soft centre’  where any malware...