Introduction

Networking in AWS is complicated. Understanding AWS networking concepts and how they work together is essential to ensure that your services are secure and have internet connectivity.

Before looking at the differences between Public & Private subnets, let’s go through AWS networking fundamentals.

AWS provides the RDS Free Tier as part of the AWS Free Tier to help new customers get started with a managed database service for free. You can choose from any of the database engines that RDS supports:

• MySQL
• PostgreSQL
• MariaDB
• Oracle
• SQL Server

AWS Identify and Access Management (IAM) provides fine-grained permissions to AWS services and resources.

In this article, we will take a closer look at the following IAM concepts:

• Roles
• Policies

What is AWS Key Management Service (KMS)?

AWS Key Management Service (KMS) is a foundational AWS service that can create and manage cryptographic keys. KMS provides a single control point from where you can manage your keys.

KMS keys have a lot of applications across various AWS services like:

• Encrypting EBS volumes
• Encrypting DynamoDB tables
• Encrypting S3 objects

Introduction

Two commands in the AWS S3 CLI that can be confusing to differentiate are cp and sync. These commands have similar descriptions, and many developers use them interchangeably without understanding the differences.

This article will list the key differences between the two commands.