•Measures analyzes & reports round-trip times, losses, availability, throughput ...
–Uses ubiquitous ping, no special host, or software to install/configure at remote sites
–Low impact on network << 100bits/s, important for many DD sites
–Covers 75+ countries (99% of Internet connected population)
•Provides quantitative historical (> 8yrs) and near real-time information
–Aggregate by regions, affiliations etc.
–How bad is performance to various regions, rank countries?
–Trends: who is catching up, falling behind, is progress being made?
–Compare vs. economic, development indicators etc.
•Use for trouble shooting setting expectations, presenting to policy makers, funding bodies