Network and Content Delivery
CoreAWS Transit Gateway
Explicit VPC troubleshooting example and hub-connectivity boundary.
Key points
- Transit Gateway provides hub connectivity whose attachment and route-table state must be included in VPC path analysis.
Best-known use cases
- D2.1, D2.2, and D5.1: diagnose a named multi-network path through the correct attachment and transit route tables.
What candidates often confuse it with
- Transit Gateway supplies hub routing; VPC peering is a direct nontransitive VPC connection and PrivateLink exposes a selected service.
Key takeaway
Follow both transit and VPC route tables and the return path before changing security filters.
Related services
- Amazon Application Recovery Controller
- AWS Client VPN
- Amazon CloudFront
Relevant exam tasks
- D2.1 — Task 2.1: Implement scalability and elasticity.
- 2.1.1 — Configure and manage scaling mechanisms in compute environments.
- D2.2 — Task 2.2: Implement highly available and resilient environments.
- 2.2.1 — Configure and troubleshoot Elastic Load Balancing (ELB) and Amazon Route 53 health checks.
- D5.1 — Task 5.1: Implement and optimize networking features and connectivity.
- 5.1.1 — Configure a VPC (for example, subnets, route tables, network ACLs, security groups, NAT gateways, internet gateway, egress-only internet gateway).