What is a cloud computing network?

The definition of cloud computing changes readily, so the definition of cloud computing networks changes as well. Ultimately, the goal of cloud computing – regardless of model – is to create a fluid pool of resources across servers and data centers that enable users to access stored data and applications on an as-needed basis. Cloud computing networks, therefore, have two missions: to enable the movement of that pool as a single virtual resource, and to connect users to these resources regardless of location.

To make that happen, cloud computing networks -- whether they support public, private or hybrid clouds – must be able to:

• Burst up and turn down bandwidth on demand.
• Provide extremely low latency throughput among storage networks, the data center and the LAN.
• Allow for non-blocked connections between servers to enable automated movement of virtual machines (VMs).
• Function within a management plane that stretches across enterprise and service provider networks.
• Provide visibility despite this constantly changing environment.

Cloud computing networks can be seen as three interdependent structures: the front-end, which connects users to applications; a horizontal aspect, which interconnects physical servers and the movement of their VMs; and storage networks. The larger cloud network can be built as either a layer 2 or a layer 3 network.

Cloud computing networks support public, private and hybrid clouds

Enterprises can use cloud computing in a number of ways, each posing a unique set of challenges to networking teams. At this point, many users rely on a public cloud model in which they access hosted applications and data through a service provider that makes resources available over the public Internet on a pay-per-use or subscription basis.