Can you rely on virtualised devices to be as secure as physical hardware?

摘要

Virtualisation technology makes best use of available processor and memory resources by running multiple virtual machines on a single physical host, writes Vernon Poole, head of business consultancy at Sapphire Technologies.rnEach virtual machine operates almost as though it were a discrete physical host. This is achieved with a piece of software known as a hyper-visor. The hypervisor is responsible for managing memory and CPU resources between the running virtual machines (also known as guest machines), providing a set of virtual hardware resources (such as display controllers and network interfaces) to guest hosts and providing a control channel between the system operator and the guest machines.