Transport and the cloud share more in common than you think. For most Australian households, the car is the preferred means of transport. Some households even have two or more cars; there is a small city car with great fuel economy and a larger SUV for the school run and Saturday sports. Most families share vehicles depending on the requirements of the day.
This is a great analogy to what companies do when they build a private cloud. Companies own all of the hardware and software that runs the private cloud, just as most households own their cars. Companies have different users that share this hardware so that each user doesn’t have to buy their own.
When your car goes in for a service, public transport is always an option. The timetables restrict you a little. However, you will only pay for the trips you take.
By using the public cloud, companies have limits on capacity but preserve capital. With no investment in technology infrastructure required, they only pay for what capacity they use. Often a smaller recurring expense is easier to budget for than a large, one-off outlay.
What happens when you need extra luggage capacity to take the in-laws to the beach house? You could hire a trailer for all the extra suitcases and surfboards. You get temporary space that works with your car.
This is exactly what companies do when they build a hybrid cloud. Companies do the majority of their work on hardware they own, but when a temporary need arises for more capacity, they can rent it from a public cloud provider. Just as the trailer connects securely via your car’s towbar, the hybrid cloud securely connects the public cloud to your private cloud.