Ping
In plain terms
A tool that tests reachability and round-trip time to a host.
Going deeper
Ping sends small ICMP packets to a host and measures whether and how fast they return, checking connectivity and latency. It's a basic network diagnostic.
Under the hood
Reports round-trip time and packet loss; firewalls may block ICMP, hiding reachable hosts.
Examples
Connectivity testing, latency checks, network troubleshooting, ICMP.
Think of it like...
Like shouting 'echo!' and timing how long until it bounces back.