What is the arp command line?

The arp command line utility is used to view and manipulate the Address Resolution Protocol (ARP) cache, which maps IP addresses to MAC addresses on a local network. It allows users to display the current ARP entries, add or delete entries, and troubleshoot network connectivity issues. Typically, it can be run in various operating systems, including Windows, Linux, and macOS, with different options and syntax. For example, running arp -a displays the current ARP table on a system.