How many times can one describe Cisco Systems Inc.'s (jaw-droppingly expensive) acquisition of Scientific-Atlanta as prescient? Not enough, apparently.

Until recently, Cisco Systems Inc. had a not-so-glaring hole in its self-defending network vision: a credible data leakage prevention strategy. Last week, the company moved to fill that hole, expanding its existing alliance with storage giant EMC to develop an

The market and technology for NAC is maturing, but the offerings from vendors exhibiting their wares at this year's RSA Security conference show that it is still far from being a commodity.