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PaaS provides tools and environments for developing and testing applications, often using IaaS as the underlying infrastructure.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},310913,1790175084,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":19,"category_name":20,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":52,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":39,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":143,"read_time":46,"preview_page_count":4},2336478466772,"https://ap-avatar.wpscdn.com/davatar_3d24733baf745e90a7e4bdd5f77d97b2","CompTIA® A+® Core 1 (220-1101)  \nCore 2 (220-1102)  \n Special Offers  \nENHANCE YOUR EXAM PREPARATION  \nSave 70% on Complete Video Course  \nTo enhance your preparation, Pearson IT Certification also sells Complete Video Courses for both streaming and download. Complete Video Courses provide you with hours of expert-level instruction mapped directly to exam objectives.  \nSave 80% on Premium Edition eBook and Practice Test  \nThe CompTIAA+ Core 1 (220-1101) and Core 2 (220-1102) Exam Cram Premium Edition eBook and Practice Test provides three eBook files (PDF, EPUB, and MOBI/Kindle) to read on your preferred device and an enhanced edition of the Pearson Test Prep practice test software.  \nPearson Test Prep online system requirements:  \nBrowsers: Chrome version 73 and above; Safari version 12 and above; Microsoft Edge 44 and above.  \nDevices: Desktop and laptop computers, tablets running Android v8.0 and above or iPadOS v13 and above, smartphones running Android v8.0 and above or iOS v13 and above with a minimum screen size of 4.7\". Internet access required.  \nPearson Test Prep offline system requirements:  \nWindows 10, Windows 8. 1; Microsoft .NET Framework 4.5 Client; Pentium-class 1 GHz processor (or equivalent); 512 MB RAM; 650 MB disk space plus 50 MB for each downloaded practice exam; access to the Internet to register and download exam databases  \nSee card insert in the back of the book >>  \nfor your Pearson Test Prep activation code and special offers.  \nThis page intentionally left blank  \nC O R E 1 ( 2 2 0-1 1 0 1 )  \nDomain 4.0: Virtualization and Cloud Computing  \nCHAPTER 21 Cloud Computing Concepts  \nCHAPTER 22 Client-side Virtualization  \nThis page intentionally left blank  \nCHAPTER 21  \nCloud Computing Concepts  \nThis chapter covers the following A+ 220-1101 exam objective:  \n▶ 4.1 – Summarize cloud-computing concepts.  \nCloud computing and virtualization in general have grown by leaps and bounds in recent years. These technologies have become so popular for businesses, organizations, and home users that they are now commonplace. You’re not likely to go a day without connecting to some kind of cloud-based service or virtualized system.  \nTwo chapters are not nearly enough to even scratch the surface of the cloud and virtualization. However, for the A+ exams, you need to know only the basics. Let’s begin with an introduction to cloud computing.  \n292  \nCHAPTER 21 : Cloud Computing Concepts  \nExamAlert  \nObjective 4.1 concentrates on the following concepts: common cloud models, cloud characteristics, and desktop virtualization.  \nIntroduction to Cloud Computing  \nCloud computing can be defined as a way of offering on-demand services that extend the capabilities of a person’s computer or an organization’s network. These might be free services, such as browser-based email from providers such as Gmail and Yahoo!, and personal storage from providers such as Microsoft (OneDrive); they might also be offered on a pay-per-use basis, such as services that offer data access, data storage, infrastructure, and online gaming. A network connection of some sort is required to make the connection to the“cloud” and gain access to these services in real time.  \nSome benefits that cloud-based services provide for organizations include reduced costs, reduced administration and maintenance, greater reliability, increased scalability, and possibly increased performance. A basic example of a cloud-based service is browser-based email. A small business with few employees definitely needs email, but it might not be able to afford the costs of an email server and perhaps might not want to have its own hosted domain and face the costs and work that go along with that. By connecting to a free (or inexpensive) browser-based service, the small business can benefit from nearly unlimited email, contacts, and calendar solutions. However, keep in mind that with cloud computing, you lose administrative control, and there are some security concerns as we","cbCaifzuarJAtYwM","https://ap.wps.com/l/cbCaifzuarJAtYwM","pdf",492270,"English","# Chapter 21: Cloud Computing Concepts\n## Introduction to Cloud Computing\n## Common Cloud Models\n### Software as a Service (SaaS)\n### Infrastructure as a Service (IaaS)\n### Platform as a Service (PaaS)","[{\"question\":\"What is cloud computing and what is required to access cloud services?\",\"answer\":\"Cloud computing is a way of offering on-demand services that extend a person’s computer or an organization’s network. Access requires some type of network connection to connect to the “cloud” and gain real-time access.\"},{\"question\":\"What benefits and drawbacks are associated with cloud-based services?\",\"answer\":\"Cloud-based services can reduce costs, reduce administration and maintenance, increase reliability and scalability, and possibly improve performance. The drawbacks include losing administrative control and having security concerns.\"},{\"question\":\"How do SaaS, IaaS, and PaaS differ in what they provide?\",\"answer\":\"SaaS delivers applications provided by a third party over the Internet, typically accessed via a web browser. IaaS provides networking, storage, load balancing, routing, and VM hosting, with the provider hosting the underlying infrastructure. PaaS provides tools and environments for developing and testing applications, often using IaaS as the underlying infrastructure.\"}]","CompTIA A+ 220-1101 Core 1 - Chapter 21 - Cloud Computing Concepts | PDF",1789891535]