Ping
From JumbaWiki
Ping is a computer network tool used to test whether a particular host is reachable across an IP network. Ping works by sending a request to the target host and listening for a response. Using interval timing and response rate, ping estimates the round-trip time (generally in milliseconds) and rate of packet loss between hosts.
The word ping is also frequently used as a verb or noun, where it can refer directly to the round-trip time, the act of running a ping program or measuring the round-trip time.
