We have three offices set in three cities in India. We have dedicated internet at all three offices. Kindly suggest the best way to create a VPN to share files and resources.
Can we share internet? For example, suppose the link in office 1 goes down, we connect via some other media and get connected to our other office?
How to share printers and other USB devices over the net? Can we share phone lines, i.e. there is a phone line at one office, but can be used to make calls from all three locations?
How can we best backup data from all three locations centrally?