A Beginner's Guide to Cloud Computing

Day1 : Prep- AWS Certified Cloud Practitioner | CLF-C02

A Beginner's Guide to Cloud Computing

Link to exam: https://aws.amazon.com/certification/certified-cloud-practitioner/

Introduction to Cloud Computing

Cloud computing refers to the delivery of various services—such as storage, processing power, databases, networking, and software—over the internet.

  • Instead of owning and maintaining physical hardware and infrastructure, users can access and utilize these services remotely through third-party cloud providers on a pay-as-you-go basis.

The Five Characteristics of cloud computing

On-demand self-serviceProvision computing resources without human interaction from the service provider.Provisioning virtual machines (VMs) for application testing.
Broad network accessAccess cloud resources over the internet from any device.Accessing CRM software from laptops, tablets, or smartphones.
Resource pooling and multi-tenancyShare and allocate resources among multiple users securely without monopolizing entire resourcesHosting multiple virtual servers from different organizations on the same physical hardware.
Rapid elasticity and scalabilityScale resources up or down quickly to adapt to workload changes, optimizing cost.Automatically increasing server capacity during peak shopping seasons for an e-commerce site.
Measured servicePay for actual resource usage, ensuring cost-effectiveness.Paying for the data transferred by a video streaming service.

Deployment Models

AspectPublic CloudPrivate CloudHybrid Cloud
OwnershipThird-party providersOrganization-ownedCombination
AWS, Microsoft Azure, Google Cloud PlatformCompany XYZ's private data centerCompany ABC using AWS for some services and private servers for others
AccessibilityOver the internetWithin company's networkBoth
Infrastructure ControlLimitedFullVaried
ScalabilityHighly scalableDepends on infrastructureVaries based on deployment model
CostPay-as-you-goInitial investment + operational costsVaries based on deployment model
ComplianceProvider certificationsOrganization controlVaried

Service Models

Reference: https://www.nearshore-it.eu/wp-content/uploads/2023/07/nearshore_2023.07.17_graphic_1.png

ExamplesIn-house data centers, self-hosted software.AWS, Azure, Google Cloud Platform.Heroku, Google App Engine, Azure App Service.Salesforce, Google Workspace, Dropbox.

The Six Advantages of Cloud Computing

Trade fixed expense CAPEX for variable expense OPEXPay only for the computing resources you use, avoiding upfront investments in data centers and servers.Paying for storage and processing power used.
Lower costsAccess lower costs by leveraging cloud provider's aggregated usage, resulting in reduced pay-as-you-go prices.Achieving lower infrastructure costs.
Stop guessing capacityScale resources up or down as required, eliminating the need for forecasting infrastructure needs and dealing with over-provisioning or under-provisioning.Scaling up server capacity during peak traffic.
Increase speed and agilityProvision new IT resources rapidly, accelerating experimentation, development, and deployment processes.Launching new application features quickly.
Reduced TCO and OPEX by avoiding running and maintaining data centersShift focus from managing infrastructure to delivering value to customers, freeing resources for innovation and business growth.Investing in customer-centric applications.
Go global in minutesDeploy applications globally with minimal effort, providing low-latency access and a superior user experience worldwide.Launching web applications internationally.


Problems Solved by cloud computing

FlexibilityScale resources as needed for changing demands.
Cost-effectivenessPay only for resources used, reducing upfront costs.
ScalabilityScale resources up or down to handle varying workloads.
ElasticityDynamically on demand, allocate resources in real-time.
High availabilityRedundant infrastructure and data replication across multiple locations ensure continuous operation and minimize downtime.
Fault toleranceMaintain reliability against hardware failures + disruptions
AgilityRapidly develop and deploy applications.
Data security and complianceProtect data with robust security measures + certifications
Collaboration and remote workFacilitate teamwork and remote work.