The Ping mini-bot discovers how long it takes for packets to reach the host you specify and/or if it's alive!!
Ping is a computer network administration utility used to test the reachability of a host on an Internet Protocol (IP) network and to measure the round-trip time for messages sent from the originating host to a destination computer.
The name comes from active sonar terminology which sends a pulse of sound and listens for the echo to detect objects underwater.
Ping is documented in RFC 792. More info on Wiki.