Which port is used for out-of-band management on a router?

• A. Console Port
• B. USB Port
• C. Ethernet Port
• D. Auxiliary Port

Answer: (A)

Out-of-band management relies on a dedicated path that works even when the regular network is down. The console port is the standard interface for this path, providing direct, local access to the router via a serial connection. With a terminal emulator on a connected PC, you can interact with the device’s CLI, view boot messages, and configure or recover the router without needing network connectivity.

The auxiliary port can also offer remote access via a dial-up modem, which is another way to manage the device when the network isn’t reachable, but the console port is the primary and most common out-of-band channel. In contrast, management over Ethernet depends on the device being reachable over the network (in-band management), and USB ports are not typically used as the main out-of-band management path.