Which of the following connection methods allows a network engineer to automate the configuration deployment for network devices across the environment?

Remote Desktop Protocol (RDP) is primarily used for remotely accessing and controlling Windows-based computers. While RDP can facilitate manual configuration tasks, it does not inherently support automation across multiple devices, making it unsuitable for large-scale deployment automation.

Telnet is a protocol used for command-line interface access to network devices. Although it allows for remote management, it lacks the automation capabilities that APIs provide. Telnet sessions must be manually executed, which does not support automated deployment across a network environment.

Graphical User Interfaces (GUIs) provide a user-friendly way to interact with network devices, allowing for configuration through visual elements. However, GUIs are not designed for automation; they require manual input for each task, making them inefficient for large-scale configuration deployments compared to APIs.