摘要：C
loud computing is an emerging area that affects IT infra-
structure, network services, and applications. In Part 1[0]
of
this two-part article, we introduced various aspects of cloud
com puting, including the rationale, underlying models, and infra-
structures. In Part 2 we discuss specifc infrastructure aspects of cloud
computing in detail, specifcally:
Network Infrastructure •
Cloud-to-Cloud and Federation Considerations •
Security •
