ITALIAN CLOUD STRATEGY 2.3 Hybrid Cloud A combination of the Public and Private Cloud models, the Hybrid Cloud, is a single environment created from several connected environments in which, depending on need, resources from both a private and a public Cloud are made available to users. This model extends the capabilities of a private cloud to use on demand the large-scale resources available on a Public Cloud, t in order to manage, for example, sudden peaks in workload; furthermore, it guarantees savings in terms of the transmission bandwidth needed to exchange data, compared to what would be possible with a connection to a data centre. 2.4 Multi Cloud Multi Cloud refers to a model in which several clouds of the same type (public or private) offered by different providers are used simultaneously to implement certain services or applications. Unlike the Hybrid Cloud, which involves the creation of a single infrastructure that transparently uses different types of Cloud (public or private), the Multi Cloud model is based on the use of different public or private Cloud environments that are not interconnected. In a Hybrid Cloud environment, the distribution of the use of computational resources between private and public is typically semi-automated and transparent to the user, whereas a Multi Cloud environment presents itself as a set of distinct computational resources that can potentially be integrated at application level. 6