14_Session 14.pdf - Session 7 Cloud Service Models...

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Session 7Cloud Service Models
Definition and characteristic of – IAAS– PAAS– SAASObjectives
The National Institute of Standards and Technology (NIST) defines three basic service models, namely, IaaS, PaaS, and SaaSIntroduction
User and service provider responsibilities of cloud service modelsWhich one is IaaS, PaaS, or SaaS?
Deployment and delivery of different cloud service delivery models
IaaS changes the computing from a physical infrastructure to a virtual infrastructureIaaS provides virtual computing, storage, and network resources by abstracting the physical resourcesAll the virtual resources are given to the virtual machines (VMs) that are configured by the service providerInfrastructure as a Service
Services provided by IaaS providersprovides virtual networking components such as virtual router, switch, and bridge for the VMs Some of the IaaS providers also provide the back end for storing files. central processing units (CPUs) and virtual main memory for the VMs that are provisioned to the end usersprovides load balancing capability at the infrastructure layer
Web access to the resources:Through any web browsers or management console, the users can access the required infrastructureCentralized management: Even though the physical resources are distributed, the management will be from a single place. Elasticity and dynamic scaling:The usage of resources can be increased or decreased according to the requirements Shared infrastructure: Allows multiple IT users to share the same physical infrastructure. IaaS ensures high resource utilization. Characteristics of IaaS
Preconfigured VMs: The IT users can select any kind of VMs of their choice. The users can directly start using the VMs as soon as they subscribed to the services Metered services: The services consumed by the IT user will be measured, and the users will be charged by the IaaS providers based on the amount of usage.Characteristics of IaaS
IaaS reduces the total cost of ownership (TCO) and increases the return on investment (ROI) for start-up companies that cannot invest more in buying infrastructure.

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Term
Summer
Professor
N/A
Tags
Software as a Service, security issues

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