hostsystem
A hostsystem is a computer or device that provides the operating environment for other software, services, or devices. In virtualization, the host system runs either a host operating system with a hypervisor or a bare-metal hypervisor, and it owns and manages the physical hardware. It allocates CPU, memory, storage, and I/O resources to one or more guest systems, which run as virtual machines on the host. The distinction between host and guest is common in virtualization technologies such as VMware, Hyper-V, KVM, or Xen.
In containerization, a host system runs a container runtime and provides the kernel and system resources shared
Beyond virtualization and containers, the term can refer to the machine that hosts network services or applications
Security considerations include keeping the host and its hypervisor or runtime up to date, segregating guest