1. CNIT131 Internet Basics & Beginning HTML
Week 13 – Cloud Computing

2. What is Cloud Computing?
IEEE (Institute of Electrical and Electronics Engineer)
Cloud computing is set of resources and services offered through the Internet. Cloud services are delivered from data centers located throughout the world. Cloud computing facilitates its consumers by providing virtual resources via internet.
NIST (National Institute of Standards and Technology):
Cloud computing is a model for enabling ubiquitous, convenient, on-demand network access to a shared pool of configurable computing resources (e.g., networks, servers, storage, applications, and services) that can be rapidly provisioned and released with minimal management effort or service provider interaction.
Wikipedia:
It is the delivery of computing and storage capacity as a service to a community of end-recipients. The name comes from the use of a cloud-shaped symbol as an abstraction for the complex infrastructure it contains in system diagrams. Cloud computing entrusts services with a user's data, software and computation over a network.

3. Cloud Computing Characteristics
On-Demand self-service – any new services and changes (storage, memory, etc.) can be enabled without human interaction
Broad Network access – services are accessible from standard network connection through thick and thin devices
Resource pooling – resources are pooled and shared among all users – nothing is dedicated (The computing capabilities are pooled to serve multiple consumers using a multi-tenant model, with different physical and virtual resources dynamically assigned and reassigned according to consumer demand)
Rapid elasticity – resources can be quickly scaled up, down, in or out based on demand (can be purchased in any quantity at any time.)
Measured Service – resource usage is measured and shown to the user regularly including charge backs where applicable

4. Service Models

5. Service Models (2) Model Resources Used for Action Example
Infrastructure as a Service (IaaS)
Computer server, Block storage, Network, Load Balance
Caching, Networking, System Management
Migrate to it
AT&T Cloud Architect, Amazon Web Services, Google Compute Engine
Platform as a Service (PaaS)
Operating System, Database, Storage, IDE, Virtualization
Application Development, Decision Support, Web, Streaming
Build on it
AT&T Cloud Architect, Amazon Web Services, Microsoft Azure, Google App Engine, Force.com
Software as a Service (SaaS)
Content, Finance software, app
, CRM, Collaborative, ERP
Consume
Salesforce, Microsoft Office 365, Google Apps

6. Deployment Models

7. Deployment Models (2) Model Description Comment Private Cloud
The cloud infrastructure is operated solely for an organization. It may be managed by the organization or a third party and may exist on premise or off premise.
Public Cloud
The cloud infrastructure is made available to the general public or a large industry group and is owned by an organization selling cloud services.
Hybrid Cloud
The cloud infrastructure is a composition of two clouds (private and public) that remain unique entities but are bound together by standardized or proprietary technology that enables data and application portability.
An organization might use a public cloud service for archived data but continue to maintain in-house storage for operational customer data. Ideally, the hybrid approach allows a business to take advantage of the scalability and cost-effectiveness that a public cloud computing environment offers without exposing mission-critical applications and data to third-party vulnerabilities.

8. References
Discovering the Internet: Complete, Jennifer Campbell, Course Technology, Cengage Learning, 5th Edition-2015, ISBN
Basics of Web Design HTML5 & CSS3, Second Edition, by Terry Felke- Morris, Peason, ISBN