I'm new to networking in general, and have only a vague understanding of network topologies.
Looking at the RIPE Atlas info video, it would seem that any user can install a probe and that then gets registered on some kind of RIPE Atlas system?
What kind of 'users' does RIPE atlas refer to in this case? If I were to install a probe on my home network, my understanding is this probe could be used to gather reliable info on my home (local) network, but that it couldn't be directly contacted via RIPE?
If 'users' referred to ISPs, then my understanding is that such a probe could be used to measure the network provided by the ISP - so the probe has a public address, since that could be provided by the ISP (but I'm not sure on this... please let me know if I'm wrong).
Question: Do RIPE Atlas probes require a public IP address? if not, say for example, they polled some data center on a regular interval, then how can RIPE be certain which network is being measured?