The Theory At APNIC we measurement aspects of technology deployment by using Google Ads to deliver a test script to a very large profile of users – We measure penetration of DNSSEC and IPv6, and many other aspects of the end user's view of the Internet through these scripts – We have some 500,000 tests executed per day – And each of them use uniquely generated URLs – And the URLs direct the end user back to our servers – So, in theory we should see each unique URL retrieved exactly once Right
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