Network Architecture

Cut S3 Data Transfer With VPC Endpoints | SAA-C03

10 January 2026·1170 words·6 mins

Architecture Drills AWS SAA-C03 FinOps Decision Matrix S3 VPC Endpoint Data Transfer Cost Network Architecture

A photo processing application faces rising data transfer costs when accessing S3. Learn why VPC Gateway Endpoints represent the optimal zero-cost, zero-complexity solution for private AWS service access—and why API Gateway and NAT Gateway are costly distractors.

VPC Isolation Trade-off for RDS Access | SAA-C03

1 January 2026·911 words·5 mins

Architecture Drills AWS SAA-C03 FinOps Decision Matrix VPC Security Groups RDS Network Architecture

Master the fundamental difference between network-layer isolation (route tables) and application-layer security (security groups) when protecting RDS databases in multi-tier VPC architectures.

Cross-Account VPC Sharing Trade-offs | SAP-C02

24 December 2025·1534 words·8 mins

Architecture Drills AWS SAP-C02 FinOps Decision Matrix AWS RAM VPC Sharing AWS Organizations Network Architecture Multi-Account Strategy

A professional-level analysis of cross-account VPC sharing strategies, comparing Transit Gateway, VPC Peering, and AWS Resource Access Manager approaches for centralized network governance in multi-account AWS Organizations.