1. Akamai mPulse. https://www.akamai.com/us/en/products/performance/mpulse-real-user-monitoring.jsp. Akamai mPulse. https://www.akamai.com/us/en/products/performance/mpulse-real-user-monitoring.jsp.
2. Boomerang. https://akamai.github.io/boomerang/. Boomerang. https://akamai.github.io/boomerang/.
3. Citrix Intelligent Traffic Management (Previously Cedexis. https://www.citrix.com/products/citrix-intelligent-traffic-management/. Citrix Intelligent Traffic Management (Previously Cedexis. https://www.citrix.com/products/citrix-intelligent-traffic-management/.
4. Fastly Insights. https://insights.fastlylabs.com/. Fastly Insights. https://insights.fastlylabs.com/.
5. Google Public DNS FAQ. https://developers.google.com/speed/public-dns/faq. Google Public DNS FAQ. https://developers.google.com/speed/public-dns/faq.