Define 'ping' in networking diagnostics.

The term 'ping' in networking diagnostics refers to a command used to test the reachability and response time of a host on a network. When a ping command is executed, it sends Internet Control Message Protocol (ICMP) echo request packets to the specified host and waits for a reply. This helps determine whether the target device is reachable and how long it takes for data to travel to that host and back, providing insights into the network's health and responsiveness.

The primary purpose of using ping is to troubleshoot network connectivity issues, allowing technicians to identify potential problems in the network's path. This command serves as a fundamental tool for diagnosing network issues, making it essential for network administration and troubleshooting tasks.

Understanding ping is vital for anyone working in networking, as it aids in both real-time diagnostics and network performance monitoring.