Once again, kudos to Mr. Webster and the Cisco SP team -- this latest Global Cloud Index is an insightful study of the ongoing impact from cloud services adoption. I believe that this data point is particularly noteworthy. "New technologies such as SDN and NFV are expected to streamline data center traffic flows such that the traffic volumes reaching the highest tier (core) of the data center may fall below 10.4 ZB per year and lower data center tiers could carry over 40 ZB of traffic per year."