Ping: [piNG] verb.
A computer query to another computer on a network to determine whether there is a connection to it. Ping is a simple tool that's similar to sonar: It allows you to send a signal out to another end point and see if you get a response back. Ping uses ICMP (Internet Control Message Protocol) to send small packets of information to other devices and receive packets in turn. These two functions are referred to as Echo Request and Echo Reply. Unlike SNMP, Ping solely tells you whether a device is online or not and how long it takes to get a response from said device.