Curriculum Overview: Mastery of AWS Network Services

This curriculum provides a structured path to mastering the networking components of the AWS Cloud, specifically aligned with the AWS Certified Cloud Practitioner (CLF-C02) objectives. It covers the creation of isolated virtual networks, connectivity strategies, and global content delivery.

## Prerequisites

Before beginning this module, learners should have a foundational understanding of the following:

• Basic IP Networking: Understanding of IP addresses (IPv4) and the client-server model.
• CIDR Notation: Knowledge of Classless Inter-Domain Routing (e.g., /16 vs. /24) for defining network ranges.
• The OSI Model: Familiarity with Layer 3 (Network) and Layer 4 (Transport) protocols.
• General Cloud Concepts: Understanding of Regions and Availability Zones.

[!NOTE] Refresher: A /16 CIDR block provides 65,536 IP addresses, while a /28 provides only 16. AWS VPCs require a CIDR between these two sizes.

## Module Breakdown

## Module Objectives

Module 1: Virtual Private Cloud (VPC) Fundamentals

• Define isolation: Explain how a VPC provides logical isolation within the AWS public cloud.
• Configure Subnets: Differentiate between public subnets (access to Internet Gateway) and private subnets.
• Manage Gateways: Identify the purpose of Internet Gateways (IGW) and Virtual Private Gateways (VPG).

Module 2: Security & Traffic Filtering

• Layered Defense: Distinguish between Security Groups (instance-level, stateful) and NACLs (subnet-level, stateless).
• Advanced Protection: Identify use cases for AWS WAF (web application protection) and AWS Network Firewall.

Module 3: Routing and Delivery

• DNS Management: Use Amazon Route 53 for domain registration and health checking.
• Edge Performance: Utilize Amazon CloudFront to cache content at Edge Locations to reduce latency.

Module 4: Connectivity Options

• Site-to-Site VPN: Establish encrypted tunnels over the public internet.
• Direct Connect: Provision dedicated, physical private connections for consistent high bandwidth.

## Visual Anchors

VPC Resource Hierarchy

Connectivity Performance vs. Cost Analysis

## Success Metrics

To demonstrate mastery of this curriculum, the learner must be able to:

• Design a Two-Tier Architecture: Diagram a VPC with a public web tier and a private database tier.
• Troubleshoot Connectivity: Identify why an instance cannot reach the internet (e.g., missing Route Table entry or IGW).
• Select Security Tools: Choose between a Security Group and a WAF for blocking specific SQL injection attacks.
• Optimize Latency: Determine when to use CloudFront to serve static images to a global audience.

## Real-World Application

In a professional environment, knowledge of AWS Network Services is critical for:

• Regulatory Compliance: Using VPC isolation and NACLs to meet PCI-DSS or HIPAA requirements for data segmentation.
• Cost Optimization: Reducing data transfer costs by utilizing CloudFront or AWS Direct Connect for large data migrations.
• Disaster Recovery: Using Route 53's health checks to automatically failover traffic from a primary region to a secondary region.

## Examples & Scenarios

Case Study: Secure Web Hosting

[!IMPORTANT] Security Group vs. NACL: Security groups are stateful (if you allow inbound, outbound is automatically allowed). NACLs are stateless (you must explicitly define both inbound and outbound rules).