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