This 2009 white paper by Cisco provides a brief and non-technical summary of network virtualization by the most important vendor in the space. Marketing material or unbiased white paper? Both. While weak on technical content we believe it is a must read because it provides context for network virtualization. Ironically it is actually marketing material that is biased. How is that possible? Given Cisco's market share just growing the market in a vendor-neutral way is proper marketing ...