Network architectures for cloud computing

As cloud computing emerges as the next architecture paradigm and business model for computing and IT service delivery, the underlining networking architecture needs to be reconsidered. Key technology trends such as virtualization, warehouse-scale computing, and Internet-scale data intensive applications bring fundamental challenges to todays network architecture, both in the data center environment and in the wide-area network environment. What limitation does todays network architecture have on cloud computing? How will network architecture evolve to better support cloud computing and cloud-based service delivery? What is the networks role in security, reliability, performance, and scalability of cloud computing? Should the network be a dumb transport pipe or an intelligent stack that is cloud workload aware?