{"id":913,"date":"2019-07-02T10:40:50","date_gmt":"2019-07-02T10:40:50","guid":{"rendered":"https:\/\/www.testpreptraining.com\/tutorial\/?page_id=913"},"modified":"2020-05-02T07:14:22","modified_gmt":"2020-05-02T07:14:22","slug":"cloud-concepts-aws-cloud-practitioner","status":"publish","type":"page","link":"https:\/\/www.testpreptraining.ai\/tutorial\/aws-cloud-practitioner\/cloud-concepts-aws-cloud-practitioner\/","title":{"rendered":"Cloud Concepts &#8211; AWS Cloud Practitioner"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">What is Cloud Computing <\/h2>\n\n\n\n<p>Cloud Computing\u2013 <\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Make use of the internet <\/li><li>Maintain data and application in remote servers to\nbe accessed by users across the globe.<\/li><\/ul>\n\n\n\n<p>Hence, it uses the computer resources that are\ndelivered as a service over the internet. <\/p>\n\n\n\n<p><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"555\" height=\"230\" src=\"https:\/\/www.testpreptraining.ai\/tutorial\/wp-content\/uploads\/2019\/07\/cloud-concepts-aws-cloud-practitioner-01.jpg\" alt=\"\" class=\"wp-image-959\"\/><\/figure><\/div>\n\n\n\n<p class=\"has-text-align-center\"><strong>Figure 1: A basic structure of cloud computing<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><a>Evolution of cloud and types<\/a><\/h2>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"458\" height=\"202\" src=\"https:\/\/www.testpreptraining.ai\/tutorial\/wp-content\/uploads\/2019\/07\/cloud-concepts-aws-cloud-practitioner-02.jpg\" alt=\"\" class=\"wp-image-960\"\/><\/figure><\/div>\n\n\n\n<p class=\"has-text-align-center\"><strong>Figure 2: How cloud computing evolved<\/strong><\/p>\n\n\n\n<p>Stages of evolution of cloud computing <\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>PC Application Era \u2013 Since 1960s till the last of 20th century. Computing as utility developed with advancement as grid computing.<\/li><li>No Cloud Era &#8211; Since end of 20th century. Internet is used to provide Application\/Software as Service.<\/li><li>Cloud Computation Era &#8211; The present era. \u201cCloud\u201d refers to internet based access to computing, storage and data.<\/li><\/ul>\n\n\n\n<p><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"517\" height=\"288\" src=\"https:\/\/www.testpreptraining.ai\/tutorial\/wp-content\/uploads\/2019\/07\/cloud-concepts-aws-cloud-practitioner-03.jpg\" alt=\"\" class=\"wp-image-961\"\/><\/figure><\/div>\n\n\n\n<p class=\"has-text-align-center\"><strong>Figure 3: Generation of Cloud<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Cloud Characteristics<\/h2>\n\n\n\n<p>Cloud computing features, by the National Institute of\nStandards and Terminology (NIST) are <\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Cost\nEfficiency: No need to deploy capital to purchase physical equipments and\nmaintain them. <\/li><li>On-demand\nself-service: Provisioning of computing resources is automatic, as per user\u2019s\nneed, without human interaction.<\/li><li>Broad\nnetwork access: Available over network, can be accessed anywhere, anytime and\non any device (mobile phones, laptops, and PDAs).<\/li><li>Resource\npooling: Multiple consumers are served using a multi-tenant model by pooling computing\nresources. <\/li><li>Device\nand location freedom \u2013 It can be accessed by a web browser regardless of\nlocation or device in use. <\/li><li>Rapid\nelasticity: Capabilities are elastically provisioned, to quickly scale out or scale\nin. Unlimited capabilities often appear to customer.<\/li><li>Measured\nservice: Exhaustive metering capability for each type of service (e.g.,\nstorage, processing, bandwidth, etc). Resource usage can be managed,\ncontrolled, and reported transparently to the provider and consumer of the\nservice. <\/li><li>Cloud\ncomputing systems typically use REST-based (Representational State Transfer) APIs\n(Application programming interface), to enable machines to interact with cloud\nsoftware<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><a>Cloud Service Models<\/a><\/h2>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"569\" height=\"238\" src=\"https:\/\/www.testpreptraining.ai\/tutorial\/wp-content\/uploads\/2019\/07\/cloud-concepts-aws-cloud-practitioner-04.jpg\" alt=\"\" class=\"wp-image-962\"\/><\/figure><\/div>\n\n\n\n<p class=\"has-text-align-center\"><strong>Figure 4: Models of cloud<\/strong><\/p>\n\n\n\n<p>Various cloud service models are <\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Infrastructure\nas a Service (IaaS)<\/li><li>Platform\nas a Service (PaaS)<\/li><li>Software\nas a Service (SaaS)<\/li><\/ul>\n\n\n\n<p><strong>Infrastructure\nas a Service (IaaS) \u2013<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>User accesses the physical hardware and can select\nas per need \u2013 CPU\/storage\/ etc.<\/li><li>Resource availability is managed by IaaS cloud\nproviders. <\/li><li>Examples: Amazon CloudFormation,&nbsp;Rackspace\nCloud, Google Compute Engine. <\/li><li>User installs operating system images with\nrequired application software. <\/li><li>Software patching and maintenance is\nresponsibility of the user.<\/li><li>Virtual machines (VMs) run as guests by a\nhypervisor, like Xen or KVM with operating system, middleware, network,\nstorage, data and applications. <\/li><li>IaaS payment depends upon resources subscribed, time\nused (per hour), usage of bandwidth (in gigabyte), storage(in gigabyte) or\ncombination of any.<\/li><\/ul>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"565\" height=\"269\" src=\"https:\/\/www.testpreptraining.ai\/tutorial\/wp-content\/uploads\/2019\/07\/cloud-concepts-aws-cloud-practitioner-05.jpg\" alt=\"\" class=\"wp-image-963\"\/><\/figure><\/div>\n\n\n\n<p class=\"has-text-align-center\"><strong>Figure 5: IaaS model<\/strong><\/p>\n\n\n\n<p><strong>Platform as a\nService (PaaS) \u2013 <\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Complete development platforms with development\ntool is provided <\/li><li>Developer builds applications without installing\nany tools on their computer and then deploy those applications without any\nspecialized systems administration skills. <\/li><li>The computer and storage resources scale\nautomatically to match application demand in PaaS.<\/li><\/ul>\n\n\n\n<p>Examples of PaaS include<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>App\nEngine&nbsp; from Google: based on Python and\nDjango<\/li><li>Force.com&nbsp;from\nSalesForce: based on the SalesForce SaaS infrastructure and Apex language<\/li><\/ul>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"568\" height=\"279\" src=\"https:\/\/www.testpreptraining.ai\/tutorial\/wp-content\/uploads\/2019\/07\/cloud-concepts-aws-cloud-practitioner-06.jpg\" alt=\"\" class=\"wp-image-964\"\/><\/figure><\/div>\n\n\n\n<p class=\"has-text-align-center\"><strong>Figure 6: PaaS model<\/strong><\/p>\n\n\n\n<p><strong>Software as a\nService \u2013 <\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Application software hosted in cloud, catering to user\u2019s need is provided on subscription basis <\/li><li>Application is accessed via web browser by users.<\/li><li>Various business applications are provided &#8211; collaboration, CRM, ERP, invoicing, HRM, etc <\/li><li>Reduces IT costs as less hardware and software maintenance costs.<\/li><li>SaaS applications provide application customization.<\/li><li>Users not responsible for hardware or software updates<\/li><li>Example &#8211; Google Apps, Dropbox, Salesforce<\/li><\/ul>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"578\" height=\"232\" src=\"https:\/\/www.testpreptraining.ai\/tutorial\/wp-content\/uploads\/2019\/07\/cloud-concepts-aws-cloud-practitioner-07.jpg\" alt=\"\" class=\"wp-image-965\"\/><\/figure><\/div>\n\n\n\n<p class=\"has-text-align-center\"><strong>Figure 7: SaaS model<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><a>Cloud Types<\/a><\/h2>\n\n\n\n<p>Various cloud\ntype offerings depending upon level of control, are <\/p>\n\n\n\n<p><strong>The Private Cloud \u2013 <\/strong>Complete private\ncontrol similar to personal data centre setup. It offers private infrastructure\nas service. Also called &#8220;internal cloud computing&#8221;. Example &#8211; VMware\nvCloud and Citrix VDI. <\/p>\n\n\n\n<p><strong>The Public Cloud &nbsp;&#8211; <\/strong>No control by user. Vendors offer cloud\ncomputing services like &#8211; Salesforce.com and ADP<\/p>\n\n\n\n<p><strong>The Hybrid Cloud \u2013 <\/strong>Itcombines both. Most company evolved from a traditional, private hardware infrastructure to a cloud-based one. For example, Cisco, offers IronPort Email Security as their hybrid solution and Google, known for hosted solution, offers Postini email archiving.<\/p>\n\n\n\n<p>Link for free practice test &#8211; <a href=\"https:\/\/www.testpreptraining.ai\/aws-certified-cloud-practitioner-free-practice-test\">https:\/\/www.testpreptraining.ai\/aws-certified-cloud-practitioner-free-practice-test<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>What is Cloud Computing Cloud Computing\u2013 Make use of the internet Maintain data and application in remote servers to be accessed by users across the globe. Hence, it uses the computer resources that are delivered as a service over the internet. Figure 1: A basic structure of cloud computing Evolution of cloud and types Figure&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":906,"menu_order":1,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"categories":[2],"tags":[],"class_list":["post-913","page","type-page","status-publish","hentry","category-amazon-aws"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Cloud Concepts - AWS Cloud Practitioner - Testprep Training Tutorials<\/title>\n<meta name=\"description\" content=\"Cloud Concepts - AWS Cloud Practitioner tutorial, brief notes, dumps, summary and pdf. 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