A network administrator at a medium-sized enterprise plans to upgrade the firmware on several critical routers. To ensure a systematic approach compliant with best practices for network management, which of these actions should most appropriately initiate the change management process?
Start with a thorough risk assessment before proposing any specific actions
Directly implement the changes during a scheduled maintenance window
Informally discuss the change with colleagues to gather feedback before proceeding
Submit a change request to the change advisory board (CAB) for review and approval