NDT (Network Diagnostic Test)
NDT (Network Diagnostic Tool) provides a sophisticated speed and diagnostic test suitable for both the novice and the network researcher. Not only does NDT report upload and download speeds, it also attempts to determine what problems limited speeds, and provides details diagnostic reporting on what it found. While the diagnostic messages are most useful for expert users, they can also help novice users by allowing them to provide detailed trouble reports to their network administrator.
There are four different ways to run an NDT test: via our new Flash Client, via the older Java client, via the official Android App, and via a Unix command-line tool.
NOTE: if the test does not run or takes longer than 60 seconds, please read the FAQ entry for "troubleshooting the NDT speed test".
Data collected by NDT is available...
- in raw format at https://storage.cloud.google.com/m-lab/ndt
- via an SQL interface (see https://developers.google.com/bigquery/docs/dataset-mlab).
- Visualized in Public Data Explorer.
Source code is available at http://code.google.com/p/ndt/source/.