
AWS Certified Advanced Networking – Specialty (ANS-C01) Certification Guide
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As mentioned before, all Amazon VPCs must have an IPv4 address range assigned at the time of creation. This IPv4 range is represented using Classless Inter-Domain Routing (CIDR) notation. You have the option to associate additional IPv4 CIDR blocks as well as IPv6 CIDR blocks with the VPC as well.
In the following sections, you will delve deeper into IP addressing within VPCs, exploring the specifics of IPv4 and IPv6 CIDR blocks. You will learn about the permissible address ranges, best practices for selecting IP ranges, and how to associate additional CIDR blocks with your VPC. This will include understanding the requirements, restrictions, and methods for expanding your VPC’s IP address space. By grasping these concepts, you will be better equipped to design scalable and efficient network architectures on AWS.
An IPv4 CIDR block assigned to an Amazon VPC must be between /16
and /28
. This means the number of IP addresses within...