AWS Cloud (Amazon Web Services)

AWS Cloud (Amazon Web Services)

AWS Cloud is a global cloud computing platform that lets you build, deploy, and scale applications without owning physical servers.

Instead of buying hardware, you rent resources on demand and pay only for what you use.

🔹 Core AWS Concepts

• Region – A geographic area (e.g., Mumbai, Singapore)
• Availability Zone (AZ) – Isolated data centers inside a region
• High Availability – Achieved by using multiple AZs
• Scalability – Scale up/down automatically

🔹 Key AWS Services (Must-Know)

🖥️ Compute

• EC2 – Virtual servers
• Auto Scaling – Adjust capacity automatically
• Lambda – Serverless functions (no server management)

💾 Storage

• S3 – Object storage (most popular AWS service)
• EBS – Block storage for EC2
• EFS – Shared file storage

🗄️ Database

• RDS – Managed SQL databases
• DynamoDB – NoSQL, serverless
• Aurora – High-performance RDS engine

🌐 Networking

• VPC – Your private cloud network
• Subnets – Public & Private
• Internet Gateway / NAT Gateway
• Route Tables & Security Groups

🔐 Security & Identity

• IAM – Users, roles, policies
• Security Groups – Instance-level firewall
• NACLs – Subnet-level firewall
• KMS – Encryption keys

🔹 DevOps & Automation

• CloudWatch – Monitoring & logs
• CloudFormation – Infrastructure as Code (IaC)
• CodePipeline / CodeBuild / CodeDeploy
• Elastic Load Balancer (ALB / NLB)

🔹 Why AWS Is Popular

• Pay-as-you-go pricing
• Highly scalable & reliable
• Strong security model
• Massive service ecosystem
• Industry demand & certifications