认识
文档：https://www.virtualbox.org/manual/topics/configuring-virtualbox.html#configuring_virtualbox
Oracle VirtualBox extension packs (file extension .vbox-extpack) extend the features of Oracle VirtualBox on the host machine. Extension packs provide extra functionality to the Oracle VirtualBox base package. The Oracle VirtualBox Extension Pack includes VirtualBox Remote DesktopProtocol (VRDP) support, disk image encryption using AES, and cloud integration features.
性质
The Oracle VirtualBox Extension Pack is an optional, separately licensed, installation package that includes these additional features:
VirtualBox Remote Desktop Protocol (VRDP) server. See Remote Display (VRDP Support). This allows remote clients to connect to a VM using RDP. For example in the case of a server running several applications in different VMs. There is no need for a GUI for any of these on the host machine, but you may wish to connect to them remotely for troubleshooting or maintenance.
Host webcam passthrough. See Webcam Passthrough.
Intel PXE boot ROM.
Disk image encryption with AES algorithm. See Encryption of Disk Images.
Cloud integration features. See Integrating with Oracle Cloud Infrastructure.
参考
Oracle VirtualBox Components https://www.virtualbox.org/manual/topics/Introduction.html#vbox-components