It is common to name as {em virtual} the imaginary space that can be created
by software using computers and networks. This space is not only a set of
processing and communications means and methods but it is also a space where
humans can ``meet,'' exchange ideas, leave messages etc. Students in Computer
Science must learn how to design, implement, manage and debug the systems and
networks that create this virtual space. Furthermore, CS students need an
experimental environment --a playground-- where they can develop their skills
at creating and supporting these virtual environments.
For this ``playground'' we propose a virtual world made up of emulated
computer systems and emulated networks. This emulated world will be
the students' testing environment, where they can run their own services,
administer their own machines and set up security attacks without any danger
to real networks and systems. It is a virtual space based on virtual machines
and virtual networks but it is also a meeting place for computer science
students, where they can test the effectiveness of their ideas.
This ``space'' therefore is a {em twice} virtual space, which we call virtual
to the second power or virtual squared (V2).
It is a also virtual place (a square) where different real computers,
virtual systems and people can meet and communicate
