NDT Speed Test
NDT (Network Diagnostic Test) is designed to measure the speed and
performance of tested networks.
This network performance test was originally developed by The Internet2 Project
and is currently maintained by Measurement Lab
(M-Lab). NDT is designed to measure
the speed and performance of networks by connecting to M-Lab servers close to
the user, and by subsequently uploading and downloading random data. In doing
so, NDT collects TCP/IP low level information that is useful to examining and
characterizing the quality of the network path between the user and the mLab
OONI utilizes an implementation of NDT
which is a network measurement library for running both desktop and mobile
network measurement tests. Running NDT can be useful as the
type of information that it collects can potentially be used to examine cases
Disclaimer: NDT is a general-purpose performance test conducted against third-party servers provided by Measurement Lab (M-Lab). M-Lab’s NDT services require the
retention and disclosure of IP addresses for research purposes. Learn more about
M-Lab’s data governance, see its privacy statement.
Read the NDT test specification.