Network Subnetting vs Supernetting?

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▬▬▬▬▬▬ 📖 Time Stamps: ▬▬▬▬▬▬
0:00 Introduction
02:45 Subnetting CIDR calculator
06:30 How create subnet in VPC
12:28 Designing Public Subnet and Private Subnet
14:29 Routing in Subnetting and Supernetting
15:51 What is Supernetting?

▬▬▬▬▬▬ Description: ▬▬▬▬▬▬
Welcome to the ultimate guide on Subnetting and Supernetting, where we’ll break down these crucial networking concepts step by step. In this video, we'll explain how to divide networks into subnets and combine them into supernets. Whether you're working with cloud environments like AWS VPC or managing on-premises networks, understanding how to efficiently manage your IP addresses is essential for building scalable and secure networks.

📌 What Will You Learn?

In this video, we cover the following topics in detail:

1. What is Subnetting?
Subnetting is the process of dividing a larger network into smaller, more manageable subnetworks. This is particularly useful when you want to isolate traffic, improve security, and optimize IP address allocation. By borrowing bits from the host portion of an IP address, you can create multiple subnets within a single larger network.
• Example: We’ll show how a 192.168.0.0/24 network can be divided into two /25 subnets, each having 128 IP addresses. Subnetting is perfect when you need to allocate specific IP ranges for different departments or applications within your organization.

2. Subnetting in VPC (Practical Application)
For those working in cloud environments like AWS, subnetting becomes essential when creating and managing Virtual Private Clouds (VPCs). In AWS, you start with a large CIDR block like 10.0.0.0/16, but you likely won’t need all 65,000+ IP addresses in one go. By subnetting, you can divide the VPC into smaller subnets such as public and private subnets to manage traffic more efficiently and securely.
• Practical Demo: Watch as we split a 10.0.0.0/16 VPC into smaller subnets, such as /24 public subnets and /26 private subnets, for a web application and database. We’ll also explain how this segmentation improves security and isolation.

3. What is Supernetting?
Supernetting is the reverse of subnetting—it allows you to combine multiple smaller networks into a larger network. This is often used to simplify routing and make network management easier.
• Example: We’ll demonstrate how two /24 networks, like 192.168.1.0/24 and 192.168.2.0/24, can be aggregated into a /22 network—192.168.0.0/22. This process is highly useful for managing IP blocks efficiently, especially when dealing with large routing tables.


4. Supernetting in Real-World Networking
Supernetting is often used by ISPs and large organizations to aggregate IP addresses and reduce the complexity of their routing tables. In this section, we’ll show you how supernetting can be applied to simplify routing in large networks and how it helps reduce the number of routing table entries, making your network more efficient.


5. Subnetting vs. Supernetting in VPCs
Both subnetting and supernetting play a significant role in cloud environments like AWS VPC. You’ll learn how subnetting helps manage traffic between different parts of your application (public and private subnets) and how supernetting can be used to simplify routing between regions or large multi-region networks.


6. Practical Tips for Subnetting and Supernetting
We wrap up with some actionable tips:
• Plan for Scalability: Always plan your network layout with future growth in mind. Choose the right subnet sizes so you have enough room for expansion.
• Understand CIDR Notation: Mastering CIDR notation is key to both subnetting and supernetting.
• Avoid Overlapping Ranges: Be careful with IP range assignments to avoid conflicts, especially when working with large networks or combining subnets.