How to use the arping command: 2-Minute Linux Tips

The video tutorial explains the R Ping command, a tool for probing systems on a local network. It combines ARP and PING functionalities, allowing users to send requests to local devices, such as routers, and receive responses that include the device's Mac address. The tutorial demonstrates using the command on a typical network and highlights its limitations, such as its inability to send requests outside the local network due to its operation at the Mac level. Despite this, R Ping is useful for identifying hosts that do not respond to higher-layer ping requests.

Why can't the R Ping command send requests to systems outside of the local network?

How can the R Ping command be useful for finding hosts that do not respond to layer three or layer four ping requests?