Which type of installation would require PXE compliance?

PXE compliance is necessary for network installations. PXE, which stands for Preboot Execution Environment, is a protocol that allows a computer to boot from a network interface before booting the operating system from a hard drive or any other local storage media. This capability is especially useful in environments where multiple machines need to be installed or configured without the need for physical media like DVDs or USB drives.

In a network installation, the system uses PXE to obtain boot files and installation files from a server over the network. This allows for easier management and deployment of operating systems in large environments, such as in enterprise settings, where administrators can initiate installations remotely.

Local installations typically involve using physical media like a hard drive or solid-state drive that contains the operating system installers. Internal installations refer to changes made within the system's existing storage configuration, which do not involve network protocols like PXE. Similarly, using a USB flash drive for installation is a method that involves local media, rather than network-based resources.

Thus, PXE compliance is specifically aligned with network installations, making it the correct choice in this context.