Book Image

Designing AWS Environments

By : Mitesh Soni, Wayde Gilchrist
Book Image

Designing AWS Environments

By: Mitesh Soni, Wayde Gilchrist

Overview of this book

Amazon Web Services (AWS) provides trusted,cloud-based solutions to help you meet your business needs. Running your solutions in the AWS Cloud can help you get your applications up and running faster while providing the security to meet your compliance requirements. This book begins by familiarizing you with the key capabilities to architect and host applications, websites, and services on AWS. We explain the available options for AWS free tier with virtual instances and demonstrate how you can launch and connect them. Using practical examples, you’ll be able to design and deploy networking and hosting solutions for large deployments. Finally, the book focuses on security and important elements of scalability and high availability using AWS VPC, Elastic Load Balancing, and Auto scaling. By the end of this book, you will have handson experience of working with AWS instances,VPC, Elastic Load Balancing, and Auto scalingrelated tasks on Amazon Web Services.
Table of Contents (12 chapters)


When you work with VPCs, subnets, security groups, and network access control lists, you will often need to specify IP address ranges. CIDR provides a succinct method, known as CIDR notation, for defining IP address blocks.

In this section, we're going to briefly explain CIDR notation and then review the valid IP address ranges you can use when defining your VPC and subnets. We'll also discuss IP addresses that are reserved by AWS, and why this is important when you're sizing your subnets.


VPCs on AWS use version 4 of the Internet Protocol, known as IPv4. We can assign the IPv6 CIDR block to our VPC, and assign IPv6 CIDR blocks to our subnets. An IPv4 address is defined using 32 bits, broken up into four parts (4x8 bits). Each part is 8 bits, and so their values range from 0 to 255. So, an IP address can be anywhere from to This means that the total number of IP addresses available globally is 2 to the 32 power, or 4,294,967,296, so basically just under 4...