AWS Certified Cloud Practitioner (CLF-C02) Study Guide

Chapter 12. AWS Networking Services

In this chapter, you’ll learn about AWS networking services. You’ll see how virtual private clouds create isolated networks, enabling your resources to stay secure and organized. You’ll also learn what makes Route 53 work, from directing global traffic with resilience to keeping your applications available through routing policies and health checks. And if you need to connect your on-premises environments to AWS, services like Site-to-Site VPN and Direct Connect come into play.

In the AWS Certified Cloud Practitioner exam, the focus is on what each networking service does, its key features, and when to use it.

Networking in a Data Center

In a data center, networking systems allow servers, applications, storage and other systems to talk to each other—both internally and across the internet.

At the core of networking are protocols. These are agreed-upon rules that govern how data moves back and forth. Here are some of the most common protocols you’ll see in a data center:

Ethernet

Created in the 1970s, this technology remains a workhorse protocol today. It uses physical cables to connect devices and delivers high-speed data transfers while ensuring the information arrives accurately.

Transmission Control Protocol/Internet Protocol (TCP/IP)

This set of protocols connects systems to the internet as well as private networks, managing the complex interactions required to deliver data packets reliably. While most networks today use Internet Protocol ...