PING
A protocol that sends a message to another computer and waits for acknowledgment, often used to check if another computer on a network is reachable.
Like sonar, in the films they "ping" a submarine.
Send out a pulse, waiti till it returns & the time it takes gives the distance away etc.
Very similar except for computing it's regarding the speed at which packets of data can travel between your PC & the final destination/server.
But on the other hand..
It is also:
A sharp, high-pitched sound, as that made by a bullet striking metal