An active measurement example: https://www.microsoft.com/en-us/research/wp-content/uploads/2016/11/pingmesh_sigcomm2015.pdf https://www.microsoft.com/en-us/rese

An active measurement example: https://www.microsoft.com/en-us/research/wp-content/uploads/2016/11/pingmesh_sigcomm2015.pdf https://www.microsoft.com/en-us/research/wp-content/uploads/...