As a metaphor for the Internet, "the cloud" is a familiar cliché, but when combined with "computing," the meaning gets bigger and fuzzier. Some analysts and vendors define cloud computing narrowly as an updated version of utility computing: basically virtual servers available over the Internet. Others go very broad, arguing anything you consume outside the firewall is "in the cloud," including conventional outsourcing. Cloud computing comes into focus only when you think about what IT always needs: a way to increase capacity or add capabilities on the fly without investing in new infrastructure, training new personnel, or licensing new software. Cloud computing encompasses any subscription-based or pay-per-use service that, in real time over the Internet, extends IT’s existing capabilities.
In summation, Cloud Computing is a model for delivering information technology services in which resources are retrieved from the internet through web-based tools and applications, rather than a direct connection to a server. Data and software packages are stored in servers. However, cloud computing structure allows access to information as long as an electronic device has access to the web. This type of system allows employees to work remotely.
Hybrid computing clouds provide cloud computing that delivers the appropriate offerings with provisioning, pay-as-you-go for relatively limitless capacity, and improved security, and some would say at a lower cost than an internal cloud. Hybrid clouds can and do offer the opportunity to provide baseline processing within your own facilities, and use service providers for peak requirements. By doing this, they can lower the cost versus private cloud computing.