AWS Network Services: Curriculum Overview

This curriculum provides a comprehensive roadmap for mastering the networking pillar of the AWS Cloud. Networking is the backbone of all AWS deployments, ensuring that data is transported securely, efficiently, and at scale. This overview covers fundamental components like VPCs, global delivery via CloudFront, and robust security layers like Network Firewalls and WAF.

Prerequisites

Before beginning this curriculum, students should have a baseline understanding of the following:

• Cloud Computing Basics: Familiarity with the AWS Shared Responsibility Model and Cloud deployment models.
• AWS Global Infrastructure: Understanding of Regions and Availability Zones (AZs), as networking services are built upon these foundations.
• Basic IP Networking: A high-level understanding of IP addresses and the purpose of a router/firewall in a traditional on-premises environment.

Module Breakdown

Learning Objectives per Module

Module 1: Virtual Private Cloud (VPC) Fundamentals

• Define the VPC: Understand how a VPC provides a logically isolated section of the AWS Cloud.
• Master IP Addressing: Learn to define CIDR blocks (e.g., 10.0.0.0/16) and allocate address ranges.
• Subnet Segmentation: Create public and private subnets to isolate resources at Layer 3.

Module 2: Network Connectivity

• Internet Access: Configure Internet Gateways (IGW) to allow communication between VPC resources and the internet.
• Resource Placement: Understand where to deploy services like EC2, RDS, and ELB within the network architecture.

Module 3: Network Security Controls

• Stateful vs. Stateless: Distinguish between Security Groups (instance-level) and Network Access Control Lists (NACLs) (subnet-level).
• Intrusion Prevention: Implement AWS Network Firewall for stateful packet inspection and web filtering across multiple VPCs.

Module 4: Global Services (Route 53 & CloudFront)

• DNS Management: Utilize Amazon Route 53 for domain registration and health checking.
• Content Delivery: Use Amazon CloudFront to cache content at Edge Locations (Points of Presence) to reduce latency for global users.

Module 5: Application Security

• Layer 7 Protection: Deploy AWS WAF to block common web exploits like SQL injection and Cross-Site Scripting (XSS).
• Centralized Management: Use AWS Firewall Manager to enforce security rules across an entire AWS Organization.

Success Metrics

To verify mastery of the AWS Network Services curriculum, you should be able to:

1. Diagram a Multi-Tier VPC: Draw a VPC with public and private subnets, including the correct routing for each.
2. Explain Security Layers: Articulate the difference between a Security Group and a NACL with 100% accuracy.
3. Calculate CIDR Ranges: Correctly identify the number of available IP addresses in a given CIDR block (e.g., a /24 vs a /16).
4. Describe Edge Logic: Explain how CloudFront uses Points of Presence (POPs) to decrease latency for static and dynamic content.

[!IMPORTANT] For the AWS Certified Cloud Practitioner (CLF-C02) exam, Domain 3 (Cloud Technology and Services) represents 34% of the scored content. Networking is a major pillar within this domain.

Real-World Application

Understanding AWS Networking is not just for passing exams; it is critical for building production-ready environments:

• Compliance: Using private subnets and NACLs to ensure sensitive data (like customer databases) is never exposed to the public internet.
• Performance: Using Amazon CloudFront to ensure a user in Tokyo experiences the same low latency as a user in New York when accessing a global application.
• Cost Optimization: Selecting the right connectivity options (like VPC Peering vs. Transit Gateways) to manage data transfer costs efficiently.

▶Click to expand: Key Comparison - SG vs. NACL

Feature	Security Group (SG)	Network ACL (NACL)
Level	Instance Level	Subnet Level
Type	Stateful (Returns are allowed)	Stateless (Returns must be explicitly allowed)
Rules	Allow rules only	Allow and Deny rules
Evaluation	All rules evaluated before decision	Rules evaluated in chronological order