You're looking for information on VirtualBox 6.1 and its Extension Pack!
4. PXE Boot Sanity He was testing a network installer. The Intel PXE boot ROM in the extension pack actually worked with his corporate VLAN tags. No more “No boot filename received.” The VM snapped to life, pulling a CentOS image at line speed. virtualbox 61 extension pack better
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In the 6.1 series, the Extension Pack is widely considered a "must-have" for a seamless workflow. Without it, users are restricted to USB 1.1 speeds, which are too slow for most modern peripherals. While the VirtualBox Guest Additions You're looking for information on VirtualBox 6
The most powerful "deep" feature of the VirtualBox 6.1 Extension Pack is NVMe over Fabric (NVMe-oF) support. Backup and Recovery: 4
While VirtualBox supports basic RDP (Remote Desktop Protocol) in the base version, it is clunky and limited. The Extension Pack enables VRDP—a proprietary, high-performance implementation of RDP.
Installing the extension pack makes VirtualBox "better" by enabling these specific functionalities: