According to [Nurmi et al 2009], the Eucalyptus project presents four
characteristics that differentiate it from others cloud computing solutions: a) Eucalyptus
was designed to be simple without requiring dedicated resources; b) Eucalyptus was
designed to encourage third-party extensions through modular software framework and
language-agnostic communication mechanisms; c) Eucalyptus external interface is
based on the Amazon API (Amazon EC2) and d) Eucalyptus provides a virtual network
overlay that both isolates network traffic of different users and allows clusters to appear
to be part of the same local network.