In the third part of our AWS Networking for Developers series, we dive into advanced connectivity options that go beyond basic VPC setup. From enabling secure service-to-service communication with AWS PrivateLink, to connecting multiple VPCs via Transit Gateway and VPC Peering, this guide breaks down when and why developers should use each feature. We also cover Internet and NAT Gateways for controlled internet access, plus Gateway and Interface Endpoints for private connectivity to AWS services—complete with real-world developer use cases to make your applications more secure, performant, and cost-efficient.