About Erlang system nodes

[Tony Zheng]

Hi

A distributed Erlang system consists of a number of Erlang runtime
systems communicating with each other. Each such runtime system is
called a NODE. Message passing between processes at different nodes. Are
these nodes physically separate? Can I make two servers in the DIFFERENT
LOCATIONS as two nodes, synchronize the data of Mnesia on the two nodes?

Thanks. 

Tony