Скачать или смотреть Day 3: Create Subnet | 100 Days of Cloud (AWS)

Today’s Topic: Networking Fundamentals A subnet is a smaller, distinct part of a Virtual Private Cloud (VPC). Before we just click "create" in the console, it is essential to understand the logic behind IP addressing.

In this video, we cover both theory and practice:

Theory: Subnet Calculation (CIDR): I will explain how CIDR notation works (e.g., /24 vs /20) and how to calculate the total number of available IP addresses in a subnet block. This is a critical skill for network design.

Theory: The 5 Reserved IPs: Did you know that you cannot use every single IP address in your AWS subnet? I will explain which 5 IP addresses AWS reserves in every subnet and why they are unavailable for your instances.

Lab: Create a Subnet: Finally, we will go into the AWS console and create a new subnet within our VPC, applying the knowledge we just learned.

This is a fundamental networking concept, so take your time with this one!

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