After entering "arp" in the MS-DOS command line, which switch would display the ARP cache?

Entering "arp" in the MS-DOS command line is used to manage the Address Resolution Protocol (ARP) cache, which maintains a correlation between IP addresses and MAC addresses on a network. To display the ARP cache, the appropriate command switch allows the user to view the currently stored entries.

The correct choice for displaying the ARP cache is the option that includes the switches "-a" or "-g." When used, these switches show the contents of the ARP table, revealing which IP addresses are mapped to which physical (MAC) addresses. This information is critical for diagnosing network issues or understanding the current state of network connectivity.

The other switches serve different purposes: one may be used to delete entries from the ARP cache, and another may be for setting static ARP entries, but neither of these commands will display the current cache. The emphasis on the display functionality distinguishes the correct answer from the others.