Comprehensive and Detailed In-Depth Explanation: PXE (Preboot Execution Environment) allows a computer to boot from a network server and install a system image remotely. It is commonly used for large-scale deployments because it eliminates the need for physical installation media. * A. ISO - Incorrect. ISO files are used for manual installations, but they do not automate network deployments. * B. Secure - Incorrect. There is no "secure boot process" option for automated deployments. Secure Boot is a security feature. * C. USB - Incorrect. USB boot requires manual installation on each device, making it inefficient for mass deployment. Reference: CompTIA A+ 220-1102, Objective 3.3 - Deployment Methods and Imaging