Cloud Computing - a term given to a network environment where computing resources (e.g. storage, compute, database, and e-mail) are physically located at a service provider's location (i.e. "in the cloud")

Types of Cloud Services:

• Public - services that interact with publicly-accessible networks or with other public clouds
• Private - services that only interact with members of the private cloud (e.g. devices within a company)
• Hybrid - a collection of services, some of which interact with public cloud services and some of which interact with private cloud services
• IaaS (Infrastructure as a Service) - allow companies to rent virtualized servers that run specific applications
• SaaS (Software as a Service) - allows companies to access software which is typically licensed by and hosted by a service provider, and made available to end users through a web browser
• PaaS (Platform as a Service) - provides a development environment (e.g. servers and infrastructure) for application programmers
• NaaS (Network as a Service) - makes network features (e.g. VPNs, elastic bandwidth, and Internet connectivity) available from a service provider

Example of companies:

• AWS (amazon Web Services)
• Google Apps for Business

Accessing Cloud Services: (How to connect enterprise to cloud provider?)

• Internet

• Add a VPN over the Internet
• Private WAN

• Intercloud Exchange - sometimes referred to as a "cloud of clouds", an intercloud exchange lets an enterprise easily connect to different cloud providers

Cloud Resources:

• Virtual Services