AWS: Networking Terminology

☁️ AWS Networking Terminology (with Explanations)

• Account:
  Used only for billing, nothing else.
• VPC (Virtual Private Cloud):
  Think of it as a mini data center in the cloud — like having your own ESX (hypervisor) environment in the cloud, complete with a small routing table for managing traffic.
• EC2 (Elastic Compute Cloud):
  A virtual server that runs inside your VPC.
• Transit Gateway:
  Functions like a router that connects multiple VPCs and on-premises networks.
• Transit Gateway Attachment:
  The connection between a VPC and a Transit Gateway — similar to the cable between an ESX server and a router.
• Transit Gateway Peering:
  A Transit Gateway-to-Transit Gateway connection, creating tunnels between different regions (like EU, CA, AU) — used for inter-region communication.
• S2S VPN (Site-to-Site VPN Tunnel):
  A secure VPN tunnel between your on-premises network and your AWS VPC, enabling communication as if they’re on the same local network.

📊 Diagram Below
The diagram illustrates how connections between VPCs and AWS Regions work — including how traffic flows through Transit Gateways and peering links.