At the prompt "RouterA(config-line)#", what configuration task can a network administrator perform?

When a network administrator sees the prompt "RouterA(config-line)#", it indicates that the command line is in line configuration mode. This mode allows the administrator to configure settings related to terminal lines, which include virtual terminal (vty) lines used for remote access protocols like SSH or Telnet.

In this context, configuring vty lines would include tasks such as setting the number of allowed connections, configuring access passwords, and enabling login methods for users connecting to the router remotely. This functionality is essential for managing how remote users interact with the network device, ensuring security and access controls are effectively enforced.

The other tasks mentioned—configuring routing settings, WAN interfaces, or the hostname—are performed in different configuration modes (global configuration mode or interface configuration mode) and not while specifically in line configuration mode. Each of these tasks requires the use of different prompts and command contexts, highlighting the specificity of commands that can be executed at each stage of the device configuration.