•Measures analyzes & reports round-trip times, losses, availability, throughput ...
–Low impact on network << 100bits/s, important for many DD sites
–Covers 75+ countries (99% of Internet connected population)
•Provide historical and near real-time quantitative information
–Aggregate by regions, affiliations etc.
–How bad is performance to various regions?
–Trends: who is catching up, falling behind?
–Compare vs. economic, financial indicators etc.
•Use for trouble shooting setting expectations, presenting to funding bodies