Theme: analysis works on the creating of cloud date centers. Plan: Plan: Cloud User’s Expectations

• Network Resiliency and Security: server consolidation brought a full control over virtual network equipment lowering the cost. SDN provides a general overview of the network topology making it easier for providers to manage and provision their virtual network infrastructure. It has also an important impact on lowering the operating costs since many of the network administration is centralized and automated. Moreover, it provides a centralized point to dis­tribute the security policies and information automatically throughout the global data center architecture.

Network resource virtualization: the combination of network programma­bility and system virtualization have brought multiple advantages to today’s cloud architectures. It certainly reduced the cost of specific hardware appli­ances (i.e., switch, routers, firewalls, etc.) by replacing them with cheaper generic hardware and advanced flexible software. The data plane has been abstracted, allowing the coexistence of multiple protocols as well as a better evolution without the need of upgrading or replacing the existent hardware stack. When it comes to users accessing their mobile virtual resources in a dis­tributed data center environment, virtualizing the entry points to the cloud becomes important for multihomed providers in order to deliver a seamless connection.

• Network resource virtualization: the combination of network programma­bility and system virtualization have brought multiple advantages to today’s cloud architectures. It certainly reduced the cost of specific hardware appli­ances (i.e., switch, routers, firewalls, etc.) by replacing them with cheaper generic hardware and advanced flexible software. The data plane has been abstracted, allowing the coexistence of multiple protocols as well as a better evolution without the need of upgrading or replacing the existent hardware stack. When it comes to users accessing their mobile virtual resources in a dis­tributed data center environment, virtualizing the entry points to the cloud becomes important for multihomed providers in order to deliver a seamless connection.

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