Study Guide for Exam I.docx - INTRO TO COMPUTERS...

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INTRO TO COMPUTERS & APPLICATIONS EXAM I STUDY GUIDE Cloud Computing AKA “Utility Computing” Definition : storing and accessing data and programs over the Internet instead of your computer’s hard drive internet-based computing that uses a network of remote (web) servers hosted on the Internet to process shared resources and data to computers and other devices on demand Elasticity Vs. Scalability Elasticity – short-term o Elasticity refers to the ability of a cloud service to provide on-demand offerings, delivering or removing resources when demand increases or decreases. Scalability – long-term o Scalability is a planned level capacity that handles the growing or diminishing resources to meet business demands. 3 Cloud Computing Services 1. Software as a Service (SaaS) a. Mainly consists of Applications (or Web Services) b. Example: Google docs, MS-Office 365, Dropbox 2. Platform as a Service (PaaS) a. allows users to build Apps b. Cloud Providers host development tools on their infrastructure, tools that are accessed by the users through the Internet c. Example of PAAS provider: Google App Engine 3. Infrastructure as a Service (IaaS) a. The user has to pay for the hardware that is managed by the Cloud provider b. Computing infrastructure is outsourced c. Example of IAAS provider: Amazon Web Services Cloud Computing Delivery 1. Public Cloud a. a type of Cloud Computing delivery that is used by multiple organizations, with shared infrastructure b. suitable for information that is not sensitive 2. Private Cloud
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a. a type of Cloud Computing delivery that is exclusively used by a single organization b. suitable for high security or sensitive information 3. Hybrid Cloud a. a type of Cloud Computing delivery that integrates a cloud managed by the user (private cloud) and one or more clouds managed by the cloud provider (public cloud) b. allows data and information to be shared between the public and private clouds Concerns with Contracting with Provider - Security o No one knows who legally owns the data (Google or yourself?) - Privacy o No certainty who can access the Cloud - Internet-dependent o what happens when Internet has gone down? Data in cloud may be gone o very unlikely though for Internet to go down Crowdsourcing and Examples Crowdsourcing - a term used to refer to the collective experiences and wisdom of individuals, teams, communities, and networks used to accomplish tasks and work Provides On-Demand Talent Capacity Enables Pay-for-Performance Allows for collaboration Expert skills & services are utilized Examples: 1. Waze a. an example of crowdsourcing because it measures the drive speed of the users to detect traffic jams, allows users to report road closures, and automatically gives the best route to take to avoid traffic.
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