What is the default interface for in-band wireless network management on a WLC?

Out-of-band management is a *method* of management that uses a separate network or interface, not the name of a default in-band management interface.

The redundant port is used for high availability between two WLCs in a redundant pair and is not the default interface for general in-band management.

The service port on a WLC is primarily for out-of-band management, such as initial setup or recovery using a direct console connection, and is not the default interface for in-band network management.

The wireless management interface (often simply called the management interface) on a WLC is the default and primary interface used for in-band access to the controller's GUI, CLI, and other management protocols like SNMP. This interface carries management traffic over the same network where client data also flows.