Network and Content Delivery
CoreVPC Reachability Analyzer
Configuration-path analysis for connectivity troubleshooting.
Key points
- Reachability Analyzer evaluates supported VPC configuration paths without sending packets or measuring live application health.
Best-known use cases
- D2.1, D2.2, and D5.1: identify the configured component blocking a named source-to-destination path.
What candidates often confuse it with
- Reachability Analyzer models configuration; Flow Logs record observed flows and network monitors measure live path behavior.
Key takeaway
Use configuration analysis to find a path break, then validate the correction with a live request or monitoring signal.
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).