The types, services, and benefits of cloud computing

 Cloud computing refers to the outsourcing of IT services and infrastructure, allowing them to be remotely accessed from anywhere, boosting efficiency. the four different categories are:

  • Public - can be used by anyone who pays, very large services such as AWS or google cloud are included
  • private - can be used by people within an organisation, usually password protected, used for work at home within a job
  • community - designed for and used by a group of organisations within a particular industry to allow all businesses to provide better services
  • Hybrid - using multiple categories each one for different things eg public, but the private for sensitive information handling

Delivery models of cloud computing

There are 6 delivery models
  • IaaS (Infrastructure as a Service): Provides virtualized computing resources like servers, storage, and networking over the cloud. Example: AWS EC2, Microsoft Azure.
  • PaaS (Platform as a Service): Offers a development environment to build, test, and deploy applications without managing underlying infrastructure. Example: Google App Engine, Heroku.
  • FaaS (Function as a Service): A serverless model where you deploy and run functions (small units of code) on-demand, scaling automatically. Example: AWS Lambda, Google Cloud Functions.
  • SaaS (Software as a Service): Delivers software applications over the internet, accessible via a browser, eliminating installation or maintenance. Example: Google Workspace, Salesforce.
  • DaaS (Data as a Service): Offers data management and analytics tools in the cloud. Example: Snowflake.
  • XaaS (Anything as a Service): A broad term encompassing all cloud-delivered services, from software to infrastructure and beyond, tailored to specific needs. Example: IoTaaS, AIaaS, etc.

These services allow businesses to operate flexibly, reduce costs, and scale efficiently by outsourcing different layers of their IT stack.


Benefits of cloud computing

Cloud portability

  • Cloud computing allows for quick and easy movement of services, it allows for:
    1. Data portability
    2. application portability
    3. platform portability

Cloud sourcing

organisations will outsource business processes to a third party, and will pay a subscription for services such as Iaas, Daas, Saas, or Paas, an example is dropbox. this allows people easy scaling options as they only pay for what they need.

Elastic cloud

This refers to an organisation's ability to scale the services as the organisation sees fit, allowing them to never have too much or too little storage, infrastructure, etc

Storage

cloud storage is generally cheaper as providers can share the cost of infrastructure across many businesses, the provider should maintain, manage, and support the storage for organisations, this means that individual organisations do not need to worry about hiring IT staff to do this, data is generally safer as providers can hire better staff. providers also have backups in case of failure

Cost effective

providers can buy large amounts of infrastructure in bulk, making it cheaper, this allows them to provide these services at a even lower price


mini self test pg 151

  1. a full backup is when every file is backed up, where as an incremental backup only backs up files that have been altered since the last backup, this is harder to set up but requires much fewer downloads each backup
  2. Staff training is very important for digital resilience strategies to work, this is because if staff are not trained they may not be safe online, and will not know what to do in the case of a breach
  3. Device hardening is the process used to reduce the chance of a successful attack
  4. cloud storage is very scalable, meaning if the company needs more storage, they can very quickly get it, it is also cheaper than physical storage hardware as providers can split the cost of the hardware over multiple companies
  5. Standard Operating Procedures (SOPs) are step-by-step instructions for workers on how to carry out a task, this insures they carry it out to a acceptable quality, consistently

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