What is the run level for multi-user mode with networking services enabled?

In Linux systems, run levels are used to define the state of the machine, particularly what services and functionalities are provided. The run level that signifies multi-user mode with networking services enabled is commonly associated with the run level denoted by the number three.

When operating in run level three, the system is configured to allow multiple users to log in simultaneously and provides full networking capabilities. This is ideal for servers and other environments where multiple users need access to resources through a network. It supports services such as SSH, FTP, and web servers.

Other run levels serve different purposes. For instance, run level two is typically used for a multi-user environment without networking. Run level four is generally reserved for user-defined purposes or custom configurations and is not universally utilized. Run level five, on the other hand, represents a state that includes a graphical user interface along with multi-user capabilities, but it is not exclusively focused on text-based multi-user networking like run level three.

Thus, the choice that correctly identifies the run level for multi-user mode with networking services is run level three.