subnetting is simple

Summary

The video script by Sunny introduces the concept of subnetting, a method to divide an IP network into smaller segments to enhance performance and security. Sunny simplifies the process with a 'Sunny Subnetting Table' to determine subnets, host ID ranges, and broadcast IDs. Using a practical example, Sunny demonstrates how to create three subnets from a given network ID, explaining each step clearly to make subnetting accessible and straightforward.

Takeaways

• 😀 Subnetting is the process of dividing a network into smaller networks to improve performance and security.
• 📚 Basic knowledge of subnet masks, network ID, host ID, and broadcast ID is essential for understanding subnetting.
• 🔑 The 'Sunny Subnetting Table' is a simple and powerful tool for solving subnetting problems, with rows for subnets, hosts, and subnet masks.
• 🔢 The first row of the Sunny Table lists numbers doubling from 1 to 256, representing the number of subnets possible.
• 🔠 The second row lists the total host IDs for each subnet, halving from 256 down to 1, which is the reverse of the first row.
• 🛡️ The third row of the Sunny Table shows the shorthand format of subnet masks, starting from /24 and increasing to /32.
• 🏢 In the given example, the task is to create three subnets for different areas of a coffee shop using a /24 subnet mask.
• 🔎 To find the suitable subnets, look at the Sunny Table and choose a column that allows for the desired number of subnets.
• 📈 The chosen subnets will have a /26 subnet mask, indicating four subnets with 64 host IDs each, minus two for network and broadcast IDs.
• 📝 Each subnet's information includes the network ID, subnet mask, usable host IDs (64-2=62), and broadcast ID, which is the last ID in each range.
• 📉 Subnetting has a downside of wasting one subnet, as in the example where only three out of four possible subnets are used.

Q & A

What is subnetting?

Subnetting is the process of dividing a network into two or more smaller networks, known as subnets. It is a logical subdivision of an IP network.

What are the main purposes of subnetting?

The main purposes of subnetting are to relieve network congestion and improve network performance and security.

What is a subnet mask and why is it used?

A subnet mask is used to separate the network ID from the host ID in an IP address. It is used to determine the size of the subnets and the number of usable host addresses within each subnet.

What are the basic knowledge requirements for understanding subnetting?

Basic knowledge requirements for understanding subnetting include understanding of IP addresses, network ID, host ID, and broadcast ID.

What is the Sunny Subnetting Table mentioned in the script?

The Sunny Subnetting Table is a simple and powerful tool created by Sunny to help with subnetting calculations. It includes rows for subnet numbers, host numbers, and subnet masks in shorthand format.

How does the Sunny Subnetting Table help in solving subnetting problems?

The Sunny Subnetting Table provides a systematic way to determine the number of subnets, the number of hosts per subnet, and the new subnet masks when dividing a network.

What is the pattern for the first row of the Sunny Subnetting Table?

The pattern for the first row of the Sunny Subnetting Table starts with 1 and doubles each subsequent number, such as 1, 2, 4, 8, 16, 32, 64, 128, and 256.

What is the pattern for the second row of the Sunny Subnetting Table?

The second row of the Sunny Subnetting Table starts with 256 and halves each subsequent number, which is the reverse order of the first row.

What is the shorthand format used for the third row of the Sunny Subnetting Table?

The shorthand format used for the third row of the Sunny Subnetting Table is the subnet mask notation, starting with /24 and increasing by 1 for each subsequent entry up to /32.

How many usable host IDs are there in each subnet when using a /26 subnet mask?

When using a /26 subnet mask, there are 64 total host IDs for each subnet. However, the first and last IDs are reserved for the network and broadcast addresses, respectively, leaving 62 usable host IDs.

How can you find the broadcast ID for each subnet?

The broadcast ID for each subnet is the last host ID in the subnet range. It can be found by adding 1 to the network ID of the next subnet or by adding the subnet size (64 in the case of /26) to the previous broadcast ID.

What is the host ID range for each subnet?

The host ID range for each subnet is the range of usable host IDs between the network ID and the broadcast ID, excluding the network and broadcast IDs themselves.

What is the downside of subnetting mentioned in the script?

The downside of subnetting mentioned in the script is the potential waste of one subnet when dividing a network into a specific number of subnets that does not perfectly match the available subnets from the subnetting process.