AWS S3 basics
S3 is durable object storage used for files, backups, logs, static assets, and data lake style workloads.
- Object storage not block storage
- Highly durable
- Great for static files and archives
AWS S3 basics
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Load balancer types in AWS
AWS offers load balancers for different layers, with ALB for HTTP/S, NLB for very high-performance TCP/UDP, and GWLB for network appliances.
- ALB is app-layer aware
- NLB is lower-level and fast
- Choose based on protocol and routing needs
Load balancer types in AWS
Security group vs NACL in AWS
Security groups are stateful instance-level firewalls, while NACLs are stateless subnet-level filters.
- Security groups attach to resources
- NACLs attach to subnets
- Stateful vs stateless is the big memory hook
Security group vs NACL in AWS
What is an AWS VPC?
A VPC is a logically isolated network in AWS where you define subnets, routing, and security boundaries.
- Private cloud network
- Subnets split public and private zones
- Security groups and routes matter
What is an AWS VPC?
What is auto scaling?
Auto scaling adjusts capacity based on demand or policy so performance and cost stay balanced.
- Scale out on load
- Scale in when safe
- Needs good metrics and startup time awareness
What is auto scaling?
What is AWS EC2?
EC2 is AWS virtual compute where you manage the instance OS, networking, and app runtime yourself.
- Virtual machine in AWS
- You manage patching and scaling
- Common for lift-and-shift workloads
What is AWS EC2?
What is AWS IAM?
IAM manages who can do what in AWS through users, roles, policies, and least-privilege permissions.
- Authentication plus authorization
- Roles are preferred for workloads
- Least privilege is the design goal
What is AWS IAM?
What is EKS?
EKS is Amazon's managed Kubernetes control plane service.
- AWS manages control plane
- You still manage nodes or Fargate choices
- Useful when you want Kubernetes without self-hosting masters
What is EKS?