What is the command to view the ARP table on a Windows, macOS, or Linux computer?

The command to view the ARP table on a Windows, macOS, or Linux computer is "arp -a." This command displays the current contents of the Address Resolution Protocol (ARP) cache, which maps IP addresses to MAC (Media Access Control) addresses.

Understanding how to access this table is important for network troubleshooting and management because it helps a user see which devices are currently recognized on the local network and their corresponding hardware address. The "arp -a" command is widely used across different operating systems, making it a universal option for checking ARP entries.

Other commands mentioned have different purposes. For instance, "show arp" is commonly used in Cisco device command-line interfaces, not Windows or Linux systems. "ifconfig" is a command that displays the configuration of network interfaces but does not specifically provide the ARP table. Lastly, "ping -a" is used to resolve a hostname to an IP address, which does not involve ARP information directly.