Content delivery networks (CDNs) will carry 72 percent of total Internet traffic by 2022, up from 56 percent in 2017, Cisco predicts. That is one indication of the importance edge computing is likely to assume, as most CDNs cache content at the edge of the wide area network.
The other clear trend is that private networks built and operated directly by enterprises such as Google, Amazon, Facebook, and Microsoft will carry a greater percentage of total traffic. In some ways, that trend mirrors the shift of retail applications (consumer and enterprise) away from connectivity providers to loosely-coupled, over the top apps.
At a high level, it can be said that more of the value of any communications-related application, service or process value is moving out of the “connectivity provider” realm. In other words, “becoming a dumb pipe” is but one impact of loosely-coupled app architecture. The other trend is that even the dumb pipe functions are taken directly by big app providers.
One way of measuring the importance of edge computing is to look at the percentage of total network capacity (wide area, metro, region and metro) used to support internet traffic.
Metro capacity is growing faster than core-capacity and will account for 33 percent of total service provider network capacity by 2022, up from 27 percent in 2017.
The obvious implication is that less data will cross WANs than otherwise would be required.
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