An efficient ping test application should not be waiting for responses from its websites for a long time; it should have a set threshold for timeout that, if a server fails to return a response under that threshold, the application will deem that server non-responsive. We therefore need to implement a way to keep track of how much time has passed since a request is sent to a server. We will do this by counting down from the timeout threshold and, once that threshold is passed, all responses (whether returned or not yet returned) will be printed out.
Additionally, we will also be keeping track of how many requests are still pending and have not had their responses returned. We will be using the isAlive() method from ...
