Amazon VPC (Virtual Private Cloud) Test

This area focuses on dividing a VPC into logical sub-networks for organizational and security control. It includes subnet creation, public vs. private subnets, AZ distribution, and routing association. Subnetting is critical for isolating workloads, minimizing blast radius, and enforcing access boundaries. A strong understanding of subnet strategy underpins high-availability architecture, secure design, and cost-effective use of NAT and internet access pathways.

Covers the use of route tables, internet gateways, NAT gateways, and route propagation to manage the movement of traffic within and beyond the VPC. This skill is vital for ensuring correct data flow between subnets, VPCs, and external systems. Misconfigured routing can cause application outages or expose services to unwanted access. Candidates must understand how to enable, restrict, and troubleshoot network connectivity safely.

This skill emphasizes controlling access at multiple layers using Security Groups, Network ACLs, and resource-level permissions. It includes stateful vs. stateless filtering and understanding how traffic is permitted or denied. Security in a VPC is paramount to protecting sensitive data and maintaining compliance. Candidates must be adept at designing default-deny postures and layering rules based on service-specific exposure.

Focuses on connecting on-premises infrastructure with VPCs using VPN, AWS Direct Connect, and Transit Gateway. It evaluates knowledge of hybrid cloud design, route propagation, and private linkages. This area is essential for enterprises migrating to the cloud or operating in a hybrid mode, requiring reliable and secure connections between corporate networks and AWS workloads.

Covers integration with AmazonProvidedDNS, Route 53 private/public hosted zones, and DHCP options sets. Name resolution is crucial for service discovery, cross-VPC access, and domain-specific routing. Mismanagement of DNS can lead to resolution failures or security risks. This skill ensures candidates understand internal DNS, conditional forwarding, and customized DHCP configurations to support scalable, multi-environment designs.

Assesses knowledge of VPC Flow Logs, Reachability Analyzer, Route Analyzer, and integration with CloudWatch. This skill ensures candidates can diagnose connectivity issues, monitor traffic patterns, and verify compliance with network intent. Monitoring is vital for security audits, performance tuning, and proactive anomaly detection in production environments.

Focuses on designing complex VPC topologies involving multi-AZ, multi-region, shared VPCs, and service-oriented segmentation. It covers high availability, fault isolation, and layered security. This skill area is important for architects who design resilient, scalable, and enterprise-grade network architectures aligned with best practices and modern cloud-native principles.

Includes understanding of VPC-related costs such as NAT Gateway charges, VPC endpoints, data transfer, and service limits. This skill enables candidates to architect networks that are not only functional but also cost-efficient. Awareness of quotas ensures scalability and prevents service interruptions due to exceeding AWS resource limits or unintentional architectural inefficiencies.

Evaluates familiarity with recent Amazon VPC updates such as VPC Lattice, IPv6-only subnets, enhanced Reachability Analyzer, or prefix lists. Staying updated is essential in a fast-evolving cloud environment. Candidates must be aware of feature improvements that can simplify architectures, enhance security, or reduce costs through more efficient service usage.

This skill area tests knowledge of how VPC integrates with services like EC2, RDS, EKS, Lambda, and S3 through interface endpoints, security configuration, and service discovery. It ensures candidates can design VPCs that effectively support AWS services with correct routing, policies, and isolation strategies for modern cloud applications.

Covers the design of networks that meet regulatory standards (e.g., PCI, HIPAA), maintain fault tolerance, and follow AWS Well-Architected Framework guidelines. It assesses the ability to enforce controls like flow logs, segregation, audit trails, and multi-layered defense. This is crucial for enterprises operating in regulated sectors or mission-critical environments.