Ping is famous as a command that sends out a little packet of info to networked PC. The computer that is being pinged firstly replies by sending another packet back to the sender. The command is utilized to determine whether a distant computer is successfully networked, or to determine the relative distance from site to site based on the time it takes for the packet to travel round trip. Used to test the connection's performance. If the other site is down, the ping fails, and if the site is up, the packet bounces back.