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Cloud services

Beginner-friendly explainers for the individual AWS, Azure and Google Cloud services you hear about most — what each one is, what it does, and when you would use it. The plain-English version, without the exam depth.

43 articles
Cloud services
What is Amazon API Gateway? A plain-English explainer

Amazon API Gateway is a managed service to create, publish, secure and manage APIs — a front door that sits in front of backend services and Lambda functions.

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Cloud services
What is Amazon Athena? A plain-English explainer

Amazon Athena is AWS’s serverless, interactive query service for analysing data directly in Amazon S3 using standard SQL — no servers or data warehouse to set up.

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Cloud services
What is Amazon Aurora? A plain-English explainer

Amazon Aurora is AWS’s cloud-native managed relational database, compatible with MySQL and PostgreSQL and built for higher performance and availability than standard engines.

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Cloud services
What is Amazon CloudFront? A plain-English explainer

Amazon CloudFront is AWS’s content delivery network (CDN) — it caches content at edge locations near users so it loads faster and reduces load on the origin.

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Cloud services
What is Amazon EKS? A plain-English explainer

Amazon EKS (Elastic Kubernetes Service) is managed Kubernetes on AWS — AWS runs the Kubernetes control plane for you, and you run your containers on top of it.

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Cloud services
What is Amazon Kinesis? A plain-English explainer

Amazon Kinesis is AWS’s platform for ingesting and processing real-time streaming data, such as logs, clickstreams, telemetry and IoT data, as it arrives.

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Cloud services
What is Amazon Route 53? A plain-English explainer

Amazon Route 53 is AWS’s scalable DNS and domain-registration service — it translates domain names to resources and can route traffic and check health.

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Cloud services
What is Amazon SNS? A plain-English explainer

Amazon SNS (Simple Notification Service) is a fully managed publish/subscribe service that fans a single message out to many subscribers at once.

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Cloud services
What is Amazon SQS? A plain-English explainer

Amazon SQS (Simple Queue Service) is a fully managed message queue that decouples the parts of an application so they can run, fail and scale independently.

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Cloud services
What is AWS Elastic Beanstalk? A plain-English explainer

AWS Elastic Beanstalk is a platform-as-a-service to deploy and run web apps — you provide the code, and it handles capacity, load balancing and scaling.

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Cloud services
What is AWS Glue? A plain-English explainer

AWS Glue is AWS’s serverless data-integration and ETL service — it discovers, catalogues and transforms data so it is ready for analytics and machine learning.

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Cloud services
What is AWS Step Functions? A plain-English explainer

AWS Step Functions is a serverless orchestration service that coordinates multiple AWS services and Lambda functions into visual workflows called state machines.

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Cloud services
What is Azure App Service? A plain-English explainer

Azure App Service is Azure’s fully managed platform-as-a-service for hosting web apps, REST APIs and mobile backends without managing the underlying servers.

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Cloud services
What is Azure Cosmos DB? A plain-English explainer

Azure Cosmos DB is Microsoft’s fully managed, globally distributed, multi-model NoSQL database — built for low-latency access at global scale.

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Cloud services
What is Azure Data Factory? A plain-English explainer

Azure Data Factory is Azure’s cloud data-integration service for building pipelines that move and transform data at scale — Azure’s counterpart to AWS Glue.

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Cloud services
What is Azure DevOps? A plain-English explainer

Azure DevOps is Microsoft’s suite of developer tools for planning, source control, CI/CD and artifacts — covering the whole software delivery lifecycle in one place.

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Cloud services
What is Azure SQL Database? A plain-English explainer

Azure SQL Database is Microsoft’s fully managed relational database service — a managed SQL Server engine that runs in Azure without you administering the server.

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Cloud services
What is Azure Synapse Analytics? A plain-English explainer

Azure Synapse Analytics is Azure’s analytics service bringing together data warehousing and big-data analytics — broadly Azure’s counterpart to Redshift and BigQuery.

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Cloud services
What is Google Cloud Functions? A plain-English explainer

Google Cloud Functions is Google Cloud’s serverless functions-as-a-service — run code in response to events without managing servers. The AWS Lambda equivalent.

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Cloud services
What is Google Cloud Pub/Sub? A plain-English explainer

Google Cloud Pub/Sub is Google Cloud’s fully managed real-time publish/subscribe messaging service, used to decouple applications and stream events at scale.

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Cloud services
What is Google Cloud Run? A plain-English explainer

Google Cloud Run is Google Cloud’s fully managed serverless platform for running containers, scaling automatically — including down to zero when idle.

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Cloud services
What is Google Cloud SQL? A plain-English explainer

Google Cloud SQL is Google Cloud’s fully managed relational database service, supporting MySQL, PostgreSQL and SQL Server without you managing the underlying servers.

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Cloud services
What is Google Vertex AI? A plain-English explainer

Google Vertex AI is Google Cloud’s unified managed platform for building, training and deploying machine-learning models, including access to generative AI foundation models.

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Cloud services
What is Amazon CloudWatch? A plain-English explainer

Amazon CloudWatch is AWS’s monitoring and observability service — it collects metrics and logs, sets alarms, and builds dashboards for your AWS resources and applications.

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Cloud services
What is Amazon DynamoDB? A plain-English explainer

Amazon DynamoDB is a fully managed, serverless NoSQL database — key-value and document data that scales automatically with low latency, with no capacity to manage.

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Cloud services
What is Amazon EC2? A plain-English explainer

Amazon EC2 (Elastic Compute Cloud) is AWS’s core compute service — resizable virtual servers, called instances, that you rent by usage instead of buying hardware.

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Cloud services
What is Amazon ECS? A plain-English explainer

Amazon ECS (Elastic Container Service) is AWS’s own container orchestration service — it runs and manages containers for you, on Fargate or on EC2.

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Cloud services
What is Amazon RDS? A plain-English explainer

Amazon RDS (Relational Database Service) is AWS’s managed relational database service — AWS handles provisioning, patching, backups and scaling for engines like MySQL and PostgreSQL.

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Cloud services
What is Amazon Redshift? A plain-English explainer

Amazon Redshift is AWS’s fully managed cloud data warehouse — built to run large-scale analytical queries over structured data for reporting and business intelligence.

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Cloud services
What is Amazon S3? A plain-English explainer

Amazon S3 (Simple Storage Service) is AWS’s object storage service — store and retrieve any amount of data as objects in buckets, built for extremely high durability.

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Cloud services
What is Amazon SageMaker? A plain-English explainer

Amazon SageMaker is AWS’s managed platform for building, training and deploying machine-learning models — the tool data scientists use to run the ML lifecycle on AWS.

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Cloud services
What is AWS CloudFormation? A plain-English explainer

AWS CloudFormation is AWS’s native infrastructure-as-code service — define AWS resources in JSON or YAML templates and provision them repeatably, with AWS managing the state.

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Cloud services
What is AWS Fargate? A plain-English explainer

AWS Fargate is a serverless compute engine for containers — it lets you run containers via ECS or EKS without provisioning or managing the underlying servers.

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Cloud services
What is AWS Lambda? A plain-English explainer

AWS Lambda is serverless compute — it runs your code in response to events without you provisioning or managing any server, and you pay only when it runs.

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Cloud services
What is Azure Blob Storage? A plain-English explainer

Azure Blob Storage is Azure’s object storage service for unstructured data — files stored as “blobs” in containers, the direct Azure equivalent of Amazon S3.

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Cloud services
What is Azure Functions? A plain-English explainer

Azure Functions is Azure’s serverless compute service — run code in response to events without provisioning servers, the direct Azure equivalent of AWS Lambda.

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Cloud services
What is Azure Kubernetes Service (AKS)? A plain-English guide

Azure Kubernetes Service (AKS) is Microsoft’s managed Kubernetes offering — Azure runs the control plane so you focus on deploying and running containerised applications.

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Cloud services
What is Azure Virtual Machines? A plain-English explainer

Azure Virtual Machines is Azure’s infrastructure-as-a-service compute — resizable virtual servers you rent by usage, the direct Azure equivalent of Amazon EC2.

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Cloud services
What is Google BigQuery? A plain-English explainer

Google BigQuery is Google Cloud’s serverless, fully managed data warehouse — query very large datasets with standard SQL without managing any infrastructure.

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Cloud services
What is Google Cloud Storage? A plain-English explainer

Google Cloud Storage is Google Cloud’s object storage service — store and retrieve any amount of data as objects in buckets, the equivalent of Amazon S3 and Azure Blob Storage.

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Cloud services
What is Google Compute Engine? A plain-English explainer

Google Compute Engine is Google Cloud’s infrastructure-as-a-service virtual machines — resizable, customisable servers you rent by the hour, the equivalent of Amazon EC2.

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Cloud services
What is Google Kubernetes Engine (GKE)? A plain-English guide

Google Kubernetes Engine (GKE) is Google Cloud’s managed Kubernetes service — built by the company that created Kubernetes — so Google runs the control plane for you.

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Cloud services
What is Microsoft Entra ID? A plain-English explainer

Microsoft Entra ID is Microsoft’s cloud identity and access management service — formerly called Azure Active Directory (Azure AD) — for managing users, sign-in and access.

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