Amazon Web Services (AWS) is a cloud computing platform that provides on-demand IT services over the internet. Instead of buying and maintaining physical servers, storage devices, networking equipment, and data centers, organizations can use AWS resources as needed and pay only for what they consume.

AWS offers services across many domains, including:

• Compute
• Storage
• Databases
• Networking
• Security
• Monitoring
• Governance
• Analytics
• Integration
• Machine Learning
• Edge and Content Delivery

AWS is widely used because it helps organizations:

• Scale infrastructure quickly
• Reduce capital expense
• Improve operational agility
• Increase global reach
• Strengthen security posture
• Accelerate innovation

AWS enables businesses to move from traditional infrastructure to a modern cloud model built on:

• Elasticity
• Reliability
• Automation
• Security
• Global availability
• Managed services

AWS provides a highly available and fault-tolerant global infrastructure.

A Region is a physical geographic area where AWS has multiple data centers.

Examples:

• US East
• Europe
• Asia Pacific
• Middle East

An Availability Zone (AZ) consists of one or more data centers within a region. AZs are isolated from each other to reduce the risk of simultaneous failure.

Edge locations are used for low-latency content delivery through services such as CloudFront.

• High availability
• Disaster recovery support
• Low-latency application access
• Geographic flexibility
• Compliance support through regional deployment options

Security in AWS is based on a shared responsibility model.

Security of the cloud, including:

• Physical data centers
• Hardware
• Networking infrastructure
• Managed service platform security

Security in the cloud, including:

• Identity and access settings
• Data encryption choices
• Application security
• Operating system hardening where applicable
• Network rules and configurations

This model is one of the most important concepts in AWS and must be understood before working with any service.

AWS services are commonly grouped into the following categories:

• Compute
• Storage
• Databases
• Networking
• Security & Identity
• DevOps & Monitoring
• Management & Governance
• Analytics
• Application Integration
• Machine Learning
• Media Services
• CloudFront & Edge

Each category serves a different purpose, but together they form a complete cloud platform.

 

AWS cloud solutions should align with these principles:

Resources should grow or shrink with demand.

Security must be built into every layer.

Architectures should handle failures gracefully.

Use only what is needed and optimize continuously.

Applications should be deployable near users worldwide.

Manual work should be replaced with code and automation.

Teams should continuously explore new services and improvements. 

Compute services provide the processing power to run workloads in AWS.

What It Is?

Amazon EC2 (Elastic Compute Cloud) provides virtual servers in the cloud.

• Resizable compute capacity
• Multiple instance types
• Support for Windows and Linux
• Full OS-level control
• Integration with storage, security, and monitoring services

• Web servers
• Application servers
• Enterprise systems
• Batch processing
• Custom business workloads

• Flexible sizing
• Scalable deployment
• High control
• Reliable infrastructure

What It Is?

AWS Lambda is a serverless compute service that runs code in response to events.

• No server management
• Automatic scaling
• Pay per execution
• Event-driven architecture
• Supports multiple programming languages

• API backends
• File processing
• Scheduled jobs
• Automation workflows
• Real-time event handling

• Faster development
• Lower operational overhead
• Built-in elasticity
• Cost efficiency for variable workloads

What It Is ?

Auto Scaling automatically adjusts resource capacity to match application demand.

• Scale out during high traffic
• Scale in during low demand
• Improve availability
• Optimize cost

• E-commerce applications
• Business portals
• Event-driven workloads
• Unpredictable traffic patterns

• Better performance
• Cost optimization
• Improved resilience

What It Is ?

Elastic Beanstalk is a platform service for deploying and managing applications.

• Simplified deployment
• Managed infrastructure
• Integrated monitoring
• Supports common application stacks

• Web applications
• Internal business applications
• Development and testing environments

• Faster deployment
• Reduced infrastructure complexity
• Developer-friendly operations

What It Is ?

Lightsail is a simplified VPS solution for small workloads.

• Fixed pricing
• Easy setup
• Bundled compute, storage, and networking
• Good for lightweight applications

• Blogs
• Small business sites
• Simple hosting environments
• Demo applications

AWS provides multiple storage types based on performance, access pattern, and cost.

What It Is ?

Amazon S3 is object storage for storing virtually unlimited amounts of data.

• Buckets and objects
• High durability
• Multiple storage classes
• Lifecycle management
• Versioning
• Encryption support

• Backups
• Data lakes
• Static website hosting
• Application file storage
• Log storage

• Massive scalability
• Cost-effective storage tiers
• Strong integration across AWS

What It Is ?

Amazon EBS is block storage for EC2 instances.

• Persistent disks
• SSD and HDD types
• Snapshots
• High performance for transactional workloads

• Databases
• Operating system disks
• Transactional applications
• Enterprise workloads

What It Is ?

Amazon EFS is a fully managed shared file system for Linux workloads.

• Scalable file storage
• Multi-instance access
• Managed availability
• Simple integration with EC2

• Shared application data
• Content management systems
• Analytics platforms
• Container workloads

What It Is ?

Amazon Glacier is archival storage for long-term retention.

• Low-cost storage
• Long-term preservation
• Compliance-friendly archive options
• Flexible retrieval times

• Regulatory records
• Old backups
• Historical archives
• Digital preservation

What It Is ?

Storage Gateway connects on-premises storage systems with AWS storage services.

• Hybrid cloud integration
• File, volume, and tape modes
• Backup and recovery support

• Hybrid backup
• Legacy system integration
• Cloud migration support

AWS provides purpose-built databases for structured, unstructured, analytical, and high-performance use cases.

What It Is ?

Amazon RDS is a managed relational database service.

• MySQL
• PostgreSQL
• MariaDB
• Oracle
• SQL Server

• Automated backups
• Patching
• Monitoring
• Multi-AZ deployment
• Read replicas

• Business applications
• ERP systems
• Operational databases
• Standard transactional systems

What It Is ?

DynamoDB is a fully managed NoSQL database.

• Key-value and document model
• Single-digit millisecond latency
• Automatic scaling
• Serverless model
• Global tables

• Mobile apps
• IoT systems
• Gaming applications
• Session storage
• High-scale APIs

What It Is ?

Aurora is a cloud-native relational database compatible with MySQL and PostgreSQL.

• High performance
• High availability
• Automated recovery
• Managed maintenance
• Read scalability

• Mission-critical applications
• High-performance transactional workloads
• Modern enterprise systems

What It Is ?

Redshift is a fully managed cloud data warehouse.

• Large-scale analytics
• Fast query performance
• Integration with BI tools
• Structured data analysis

• Reporting platforms
• Business intelligence
• Data warehousing
• Enterprise analytics

What It Is ?

ElastiCache is a managed in-memory caching service.

• Redis
• Memcached

• Session storage
• Real-time apps
• Performance acceleration
• Database offloading

Networking services define connectivity, traffic control, segmentation, and secure communication in AWS.

What It Is

Amazon VPC provides a logically isolated network in AWS.

• Custom IP address ranges
• Public and private subnets
• Route control
• Gateway connectivity
• Security layers

• Application isolation
• Secure infrastructure design
• Multi-tier architectures

What They Are ?

Subnets divide a VPC into smaller network segments.

• Public subnet
• Private subnet

Subnets help control resource placement, security boundaries, and routing behavior.

What They Are ?

Route tables determine how network traffic moves between resources and external destinations.

• Local VPC traffic
• Internet Gateway
• NAT Gateway
• VPN
• Peering connections

What It Is ?

An Internet Gateway enables resources in public subnets to communicate with the internet.

• Public web servers
• Bastion hosts
• Public-facing APIs

What It Is ?

A NAT Gateway allows outbound internet access from private subnets while blocking inbound initiation.

• Software updates
• Patch downloads
• Secure outbound connectivity from internal workloads

What It Is ?

A Network ACL is a stateless subnet-level security mechanism.

• Additional traffic filtering
• Explicit allow/deny rules
• Security segmentation

Security is central to every AWS design.

What It Is ?

IAM controls authentication and authorization in AWS.

• Users
• Groups
• Roles
• Policies

• Use least privilege
• Enable MFA
• Use roles instead of long-term keys
• Rotate credentials regularly

What It Is ?

KMS manages encryption keys used across AWS services.

• Encrypt S3 objects
• Encrypt EBS volumes
• Protect database data
• Application-level key use

What It Is ?

Cognito provides user authentication and identity services for applications.

• User sign-up and sign-in
• Mobile app authentication
• Social login integration

What It Is ?

Security Token Service provides temporary credentials.

• Cross-account access
• Federated access
• Temporary sessions

What It Is ?

Secrets Manager securely stores and rotates secrets.

• Database passwords
• API keys
• Tokens
• Connection credentials

What It Is ?

GuardDuty is a managed threat detection service.

• Detect suspicious activity
• Analyze account behavior
• Alert on possible threats

These services help monitor, automate, trace, and manage cloud operations.

What It Is ?

CloudWatch collects and visualizes operational data.

• Metrics
• Logs
• Alarms
• Dashboards
• Events

• Infrastructure monitoring
• Alerting
• Application health checks

What It Is ?

CloudTrail records AWS API activity.

• Governance
• Auditability
• Security investigations
• Compliance reporting

What It Is ?

AWS Config tracks resource configurations and changes over time.

• Compliance checks
• Drift detection
• Resource history review

What It Is ?

CloudFormation provisions AWS infrastructure using templates.

• Repeatability
• Standardization
• Automation
• Reduced manual errors

What It Is ?

CodePipeline automates software release pipelines.

• Source
• Build
• Test
• Deploy

• Faster delivery
• Consistency
• DevOps workflow automation

What It Is ?

X-Ray helps analyze and debug distributed applications.

• Microservices tracing
• Performance troubleshooting
• Dependency mapping

These services help organizations control environments, enforce standards, and optimize operations.

What It Is ?

Systems Manager helps manage infrastructure at scale.

• Patch management
• Automation
• Inventory
• Session management

What It Is ?

Trusted Advisor provides recommendations for cost optimization, security, and performance.

• Cost
• Security
• Fault tolerance
• Service limits
• Performance

What It Is ?

Organizations centrally manages multiple AWS accounts.

• Policy control
• Account grouping
• Central billing
• Governance at scale

What It Is ?

Service Quotas helps manage AWS service usage limits.

What It Is ?

AWS Backup centralizes backup policies and recovery management across AWS services.

Analytics services transform raw data into meaningful information.

What It Is ?

Athena is an interactive query service for data stored in S3.

• Uses standard SQL
• No infrastructure to manage
• Good for ad hoc analysis

What It Is ?

EMR is a managed big data platform for frameworks such as Hadoop and Spark.

• Data processing
• Large-scale analytics
• ETL workloads

Already covered under databases, Redshift also plays a major role in analytics and enterprise reporting.

What It Is ?

QuickSight is a business intelligence and visualization service.

• Dashboards
• KPI reporting
• Executive insights

What It Is ?

Kinesis collects and processes streaming data in real time.

• Log streaming
• IoT telemetry
• Real-time analytics

These services connect distributed systems and support event-driven architectures.

What It Is ?

SQS is a message queuing service for decoupling applications.

• Reliability
• Loose coupling
• Asynchronous processing

What It Is ?

SNS is a publish/subscribe messaging service.

• Notifications
• Fan-out messaging
• Alerting systems

What It Is ?

EventBridge is an event bus for building event-driven solutions.

• System integration
• Automation
• Application events

What It Is ?

Step Functions orchestrates workflows across AWS services.

• Multi-step automation
• Serverless workflows
• Data processing pipelines

What It Is ?

API Gateway creates, publishes, and secures APIs.

• REST APIs
• HTTP APIs
• Lambda integrations
• Backend access control

What It Is ?

AppFlow transfers data between SaaS applications and AWS services securely.

AWS offers machine learning services for building, training, and using intelligent models.

What It Is ?

SageMaker helps build, train, and deploy machine learning models.

• Predictive analytics
• Model development
• AI-powered applications

What It Is ?

Rekognition provides image and video analysis.

• Face detection
• Object recognition
• Media analysis

What It Is ?

Comprehend extracts meaning and insights from text.

What It Is ?

Forecast provides time-series forecasting using machine learning.

What It Is ?

Lex enables conversational interfaces such as chatbots.

Media services support video processing and delivery workflows.

What It Is ?

MediaLive provides live video encoding and streaming.

What It Is ?

MediaConvert converts video files at scale.

What It Is ?

Speeds up file transfers to Amazon S3 using optimized network paths.

These services improve global delivery and edge performance.

What It Is ?

CloudFront is a content delivery network (CDN).

• Low latency
• Faster delivery
• Global caching
• Better user experience

What It Is ?

Route 53 is a scalable DNS and domain management service.

• Domain routing
• Health checks
• Traffic policies

What It Is ?

Improves application availability and performance using the AWS global network.