server to server

one of my client wish to host his domain on two different hosting servers with two different companies. being noob on hosting stuff, I wonder if it is possible to host single domain on two different servers with two different companies without changing anything on domain?

I've learned much from bhw ,I think I must contribute bhw now. I code this tool, wish It can help U .the tool is for downloading file from other server. example:If U have two web hosting ,U want to copy file from one to another..nomally U must download file to your pc,then upload to...