M-Lab is openly available to the public, and collected in a manner that does not reveal potentially identifiable user information, outside of the client’s IP address.

Parameters & Calculations {#sec:mathishard}
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NDT provides a multiplicity of metrics and diagnostic information that describe the test session. As outsiders attempting to assess the behavior and actions of network intermediaries, we are relegated to beginning from assumptions and hypotheses founded on general principles of networking and how others accomplish throttling. Additionally, we are limited in the lessons to be gained from the corpus of research on assessing violations of network neutrality, as we struggle to establish control measurements and perform the active probing necessary for proper comparative analysis. Most methods for measuring broad or application-specific throttling assume that connections are initially allocated a higher level of throughput, which is then throttled or terminated upon identification by a network intermediary or exceeding a bandwidth quota. Therefore, our primary form of detection of abnormal network conditions is comparative assessment of selected indicators based on historical trends and incongruities between subgroups of clients. In order to allow this comparative assessment through baselines that serve as controls, we define a set of measurements and aggregate clients in 