Networking

Private Subnet Internet Access - The HA vs. Cost Trade-off | SAA-C03

30 January 2026·1392 words·7 mins

Architecture Drills AWS SAA-C03 FinOps Decision Matrix VPC NAT Gateway High Availability Networking

Learn why NAT Gateway placement in public subnets across all AZs is the AWS-recommended pattern for private subnet internet access, and understand the hidden cost implications of high availability decisions.

Centralized TGW Routing Across Accounts | SAP-C02

25 January 2026·1616 words·8 mins

Architecture Drills AWS SAP-C02 FinOps Decision Matrix Transit Gateway AWS RAM VPC Peering Multi-Account Networking

A hybrid enterprise needs to connect hundreds of VPCs across AWS accounts to on-premises infrastructure while maintaining granular routing control. This drill examines Transit Gateway architecture, cross-account sharing via AWS RAM, and the FinOps implications of centralized vs. distributed network topologies.

Shared VPC vs Peering for Projects | GCP ACE

7 January 2026·657 words·4 mins

Architecture Drills Google Cloud Platform GCP ACE GCP FinOps SRE VPC Networking

This drill explores connecting Compute Engine instances running in separate VPCs and projects, focusing on the best practices for network sharing and access control.

Private DNS Auto-Registration Decision | Azure AZ-104

17 December 2025·706 words·4 mins

Architecture Drills Microsoft Azure AZ-104 Azure CAF Governance Private DNS Networking

A breakdown of VM DNS integration focusing on Azure Private DNS auto-registration, governance, and hybrid network design.