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Explanation
Amazon Virtual Private Cloud (VPC) is a logically isolated network environment where AWS resources are launched. A VPC enables complete control over IP addressing, subnets, routing, and security. It supports public and private subnets, allowing separation of internet-facing resources from internal services. Core components include route tables for traffic flow, internet gateways for public access, NAT gateways for outbound internet access from private subnets, and security controls using security groups and network ACLs. VPC peering and private endpoints enable secure communication between VPCs and AWS services without traversing the public internet.
Table
| Component | Function |
|---|---|
| VPC | Network isolation boundary |
| Subnet | Network segmentation |
| Route Table | Traffic routing |
| Internet Gateway | Public internet access |
| NAT Gateway | Outbound access for private subnets |
Example
A three-tier application is deployed inside a VPC. The web layer runs in a public subnet with internet access. Application servers and databases are placed in private subnets with no direct internet exposure. NAT gateways allow outbound updates from private instances. Security groups restrict traffic between layers. This design improves security, scalability, and manageability.
Use Cases
• Secure application networking
• Isolation of cloud workloads
• Hybrid cloud architectures
• Private access to AWS services
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Virtual Private Cloud (VPC)
