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IPv6 Growth Inflection Point

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Now that the percentage of IPv6 users accessing Google's websites has reached 4% , I decided to revisit my prior post projecting IPv6 growth . Assuming that people around the world use google as it sits atop Alexa’s list of top websites, it would seem such a measurement provides data that could be loosely projected to the Internet at large. It took just 140 days for the IPv6 user rate to climb from 2% to 3%, and interestingly only 140 days from 3% to 4%. Is IPv6 growth going linear? Or more likely have just passed an inflection point beyond which growth will accelerate? Reiterating our view that the historical IPv6 user data is comprised of two segments, the first being the nearly linear component of near zero penetration up through 2011, and the second representing the present growth phase, we plot the measured IPv6 penetration since the end of 2011. Applying both exponential and second order polynomial curve fittings as before in Figure 1, we see that our exponential curve, the