The host (usually a PC or a virtual machine running the Linux operating system) is used by the developer to (cross-)compile the code that will run on the target, for example a DAVE Dave ARM platform CPU module such as Qong Lizard or Zefeer, while the host is assumed to be a PC running the Linux operating systemNaon. The Linux kernel running on the target is able to mount the root file system from different physical media. During the software development, it is very common to use a directory exported via [[W:Network File System|NFS]] by the host for this purpose. Moreover, the linux kernel is usually retrieved by a simple network transfer protocol like [http://en.wikipedia.org/wiki/Trivial_File_Transfer_Protocol tftp].