Seamless mode is a feature that lets you run application windows from the virtual machine alongside apps from your actual host PC. For example, you can display the virtual machine in full-screen at 1080 pixels with a compatible monitor. But, you'll get control over the resolution settings once you install Guest Additions. Virtual machines don't support high-resolution graphics out of the box. You can also drag files between the host and virtual machine or from one virtual machine to another. Guest Additions allow you to copy items on a virtual machine and move them easily to the host. You might want to move files between your virtual machine and your host computer. The extra functionality they provide includes They're included in any copy of VirtualBox that you download. Guest additions are extra software that you can install on a virtual machine to improve its performance and functionality. Thanks to the OVF standard, you can even import virtual machines created with different virtualization software. You can also easily import or export virtual machines using the Open Virtualization Format (OVF), an open-source standard. For instance, you can create a virtual machine on Linux (opens in new tab) and run it on another Windows-powered device. This way, you can run virtual machines created on one host device on another host with a different operating system. To a large extent, VirtualBox is functionally identical on all host operating systems, with the same file and image formats. In contrast, bare-metal or type 1 hypervisors run directly on the hardware. VirtualBox is a hosted hypervisor, also called a type 2 hypervisor, meaning it requires an existing operating system to be installed first.

It divides the resources of the host hardware and allocates them to the virtual machines to make them function like different computers (opens in new tab). VirtualBox is a hypervisor- a program that runs or manages multiple virtual machines on a separate computer.

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