A storage appliance has lost all network access. Which of the following network access methods could a storage engineer use to investigate and correct the issue?

HTTP (Hypertext Transfer Protocol) requires IP network connectivity to access a web-based management interface, which would be unavailable if the appliance lost all network access.

A console port provides a direct serial connection to a device's command-line interface (CLI) or management interface, functioning completely out-of-band. This method is critical for troubleshooting and reconfiguring network settings when the primary network interfaces are completely down or misconfigured, as it does not rely on IP connectivity to the appliance.

RDP (Remote Desktop Protocol) is used for graphical remote access to Windows-based systems and requires active IP network connectivity, which is not present in this scenario.

SSH (Secure Shell) provides secure command-line remote access over an IP network and would be unusable if the storage appliance has lost all network access.