CNIT131 Internet Basics & Beginning HTML Week 13 – Cloud Computing http://fog.ccsf.edu/~hyip

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.

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

Service Models

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 Email, CRM, Collaborative, ERP Consume Salesforce, Microsoft Office 365, Google Apps

Deployment Models

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.

References Discovering the Internet: Complete, Jennifer Campbell, Course Technology, Cengage Learning, 5th Edition-2015, ISBN 978-1-285- 84540-1. Basics of Web Design HTML5 & CSS3, Second Edition, by Terry Felke- Morris, Peason, ISBN 978-0-13-312891-8.