Final answer:
The whoami command is used to display the username of the current user in the UNIX system, fulfilling the requirement to enumerate basic user information.
Step-by-step explanation:
The command to enumerate basic user information for UNIX network resources from the given options is whoami. This command will tell the user their own username in the system. It's a straightforward command used to quickly ascertain the current user's identity within a UNIX environment. Commands such as ls (for listing directory contents), pwd (for displaying the current directory), and ifconfig (for configuring network interfaces) serve different purposes in the UNIX system.