The diagram on the left shows the field created by that one magnet. The diagram in the middle shows what happens when you place an iron plate near that magnet. The field on the other side of the plate is almost nil.
Guest Account - Turn On or Off in Windows 8. A guest account is a local account for users who don't have a permanent account on your PC or domain. It allows people (guest) to use your PC without having access to your personal files. Users signed in to the guest account can't install apps, install hardware, and change PC settings. This tutorial will show you various options for how to turn on or off the guest account in Windows 8, Windows RT, Windows 8.1, and Windows RT 8.1.
host server; the underlying hardware that provides computing resources, such as processing power, memory, disk and network I/O, and so on. The guest is a completely separate and independent instance of an operating system and application software. Guests are the virtual workloads that reside on a host virtual machine and share in that server's computing resources. Virtualization platforms such as VMware vSphere, Microsoft Hyper-V and Citrix Systems' XenServer install a layer of abstraction between the host and guest.