Cloud Computing

• The on-demand delivery of IT resources over the Internet with pay-as-you-go pricing
  1. IT resources are fundamental, broadly similar tools used by different companies
  2. Over the internet means it can be served to any device with Internet connectivity
  3. Pay-as-you-go means you pay for resources based on need and use, not simply having them, available
• Offers flexibility of being able to request and release resources as needed, only paying for what's in use
• Significantly reduces CapEx by increasing OpEx
  • Reduces the impact of under- or over-estimating required resources
• By sharing hardware resources, individuals and companies with reduced need can pay for less and have lower idle resources than self-hosted solutions
• Resiliency and global reach of cloud servers allows for rapid access across the world

Deployment Models

1. Cloud-based
   1. All parts of the application are run in the cloud
   2. These applications could be designed and built for cloud use, or migrated from existing infrastructure
2. On-prem (private cloud)
   1. Applications are deployed using on-prem hardware
   2. Applications can be run in virtualized environments or on dedicated servers
3. Hybrid
   1. Cloud-based resources are connected to on-prem infrastructure
   2. This can be useful to meet compliance or regulations, while offloading non-regulated or other resources to the public cloud

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