Oracle Cloud Infrastructure Architect Professional Workshop — Lesson 2: VCN Architecture, Hybrid Connectivity, DNS, Security, and Traffic Flow

Learning Objectives

• Explain the architecture, workflow, or business purpose behind VCNs, subnets, route tables, gateways, peering, and transit designs.
• Apply FastConnect, VPN, DRG v2, route distribution, and hybrid resilience and NSGs, security lists, firewalls, bastions, WAF, and zero-trust boundaries in a controlled scenario.
• Validate outcomes and troubleshoot risks involving DNS, load balancers, traffic steering, private access, and connectivity tests.

Detailed Topics

• VCNs, subnets, route tables, gateways, peering, and transit designs
• FastConnect, VPN, DRG v2, route distribution, and hybrid resilience
• NSGs, security lists, firewalls, bastions, WAF, and zero-trust boundaries
• DNS, load balancers, traffic steering, private access, and connectivity tests

Instructor Demonstration

Demonstrate VCNs, subnets, route tables, gateways, peering, and transit designs within a multi-region customer platform migrating to OCI with strict isolation, recovery, performance, compliance, and cost requirements, then capture the exact configuration, command, transaction, report, model, query, code, or process evidence that proves the result for lesson 2.

Hands-On Exercise

Implement a controlled exercise covering FastConnect, VPN, DRG v2, route distribution, and hybrid resilience and NSGs, security lists, firewalls, bastions, WAF, and zero-trust boundaries, then introduce and resolve an exception involving DNS, load balancers, traffic steering, private access, and connectivity tests while preserving before-and-after evidence.

1. Confirm the environment, identities, inputs, dependencies, risks, and expected outcome.
2. Complete the course-specific configuration, development, analysis, or process workflow.
3. Capture settings, commands, data, outputs, logs, reports, screenshots, calculations, or test results.
4. Compare the observed result with acceptance criteria and document corrective action.

Scenario Analysis

• Identify the technical or business decision that must be made.
• Compare valid approaches and their security, performance, reliability, cost, compliance, and support trade-offs.
• Define rollback, recovery, ownership, communication, and evidence requirements.

Troubleshooting Guidance

Diagnose issues across VCNs, subnets, route tables, gateways, peering, and transit designs, FastConnect, VPN, DRG v2, route distribution, and hybrid resilience, NSGs, security lists, firewalls, bastions, WAF, and zero-trust boundaries, DNS, load balancers, traffic steering, private access, and connectivity tests without making an unverified production change. Separate symptoms from causes, gather evidence, test the smallest reversible correction, rerun validation, and record preventive action.

Validation Checklist

• The requirement, scope, inputs, dependencies, and expected result are documented.
• The result is reproducible and supported by course-specific evidence.
• Normal, boundary, failure, security, performance, and operational conditions are reviewed.
• Exceptions, rollback, ownership, and the next improvement priority are recorded.

Lesson Outcome

Learners can apply VCN Architecture, Hybrid Connectivity, DNS, Security, and Traffic Flow in a realistic Oracle Cloud Infrastructure Architect Professional Workshop scenario and validate the result with documented evidence.