VPC itself is pretty good, but understanding it well is key. One of the challenges for beginners is understanding IP address ranges and subnet concepts. For example, why use a /16 CIDR block for a VPC versus a /24? It's important to understand these concepts before creating a VPC. Once you understand the basics, you can leverage VPC features based on your architecture. For example, a three-tier architecture (web application, database, etc.) can benefit from public and private subnets. The web application can reside in a public subnet for internet access, while the database can reside in a private subnet for security, only accessible through the web application. This helps isolate resources and improve performance. So, the first step is understanding VPC creation and then using subnets (public and private) based on your architecture. Public subnets can connect to the internet, while private subnets cannot by default. For internet access in a private subnet, you can use a NAT Gateway and route tables. Other components include the internet gateway (for public subnet internet access), Elastic IPs (static IP addresses), and more advanced options like VPN connections, AWS PrivateLink, etc. Once you grasp these basic concepts, you can explore the more advanced features.
