I will be the first to admit i know very little about large scale networking, and i get lost following most of the posts in this forum. So please, if you are going to spend some of your precious time answering this question, please spend a bit more time explaining your acronyms (unless they are obvious - to me ofcourse).
I want to link up two machines that are in different areas of the world. However i dont want either machine to be linked to the public internet. I mean i dont want information to pass through unknown routers/links around the world. Is that possible? Or will i need to invest millions into installing my own private network - wires/routers (as good as impossible)? Or can i get the telecommunications companies of the countries involved to lease some isolated parts of their network (not really private network)? Does the definition of a WAN imply that the Internet MUST be used?
Assuming this is not viable, how do i go about connecting these two machines through the public routers of the Internet, but without subscription to a third party ISP? Each machine will really be part of its own network(LAN). The bandwidth within the LANs run on 10/100MB/s ethernet cards. Does that mean to extend the LANs to a WAN, i need a similar 10/100MB/s bandwidth within the WAN? Is is possible i need to set up my own ISP? Is it possible to setup a WAN without an ISP?
Currently both LANs use TCP/IP for communication. If the WAN was setup using TCP/IP too, and connected to the internet which uses the same protocols, wouldnt this open up a fundamental security hole (regardless of whether a firewall is installed)?
If any of my questions are contradictory or simply dont make sense, it is because they reflect my lack of understanding of wide area networking. Please point this out.