|Connection Type||Connection Description||Ping||Query||Address||Port||Time|
For each of the rows in the table, Wily runs out and says can I get to you(Ping) and do you have any data(Query). For the various DHI servers the IRIS nameserver is used to resolve their locations, so if it's down, so are the DHI objects.
The Update Results and Reinitialize Tests links control Wily's querying. Update Results reloads the page to see the results of the current set of tests. If you click Reinitialize Tests, Wily forgets everything it knows about the servers and runs its tests again. It doesn't reinitialize more than once a minute, so feel free to click away.
Wily, the software, was developed at the University of South Carolina under IRIS funding.