Cara Menghitung Subnetting IP Address

Summary

In this educational video, the presenter explains key concepts of subnetting, focusing on IP address ranges, subnet masks, and prefix notations. The video covers the difference between IP host, IP network, and IP broadcast addresses, offering a step-by-step guide to calculating and understanding subnetting using specific examples. Viewers are shown how to calculate IP ranges, subnet masks, and how to determine usable IP addresses within a given subnet. The video also includes a practical case study to help viewers grasp the concepts of IP address allocation and subnetting techniques.

Takeaways

• 😀 Remember to subscribe to the channel and activate notifications before watching the video.
• 😀 The script discusses the concept of subnetting, focusing on IP addressing, including IP Host, IP Network, and IP Broadcast.
• 😀 IP Host is the range of IP addresses between the IP Network and IP Broadcast addresses.
• 😀 IP Network refers to the range of IP addresses starting from the lowest address in a subnet.
• 😀 IP Broadcast refers to the range of IP addresses at the highest end of the subnet.
• 😀 Subnet masks are written in 32-bit format, representing binary numbers.
• 😀 The script explains subnetting through a table with subnet masks, prefixes, number of IPs, and usage examples.
• 😀 A prefix of 24 means 256 IP addresses are available in the subnet, while a prefix of 30 allows only 4 IP addresses.
• 😀 The video walks through an example of calculating IP range, network, and broadcast addresses based on an IP address (192.168.8.155 with prefix 27).
• 😀 The formula to calculate the range of IP addresses, network, and broadcast addresses is explained using subtraction and addition based on the prefix.
• 😀 Subnet mask calculation is demonstrated, showing how to determine the correct subnet mask based on the prefix length (255.255.255.224 for the given example).

Q & A

What is the purpose of subnetting in IP addressing?

Subnetting divides an IP address into smaller, more manageable networks, making it easier to allocate IPs efficiently and secure communication within different segments of a network.

What is an IP Host?

An IP Host refers to the range of IP addresses between the IP Network and IP Broadcast addresses. These are the usable addresses assigned to devices within a network.

What is an IP Network?

The IP Network address is the first address in a subnet, representing the network itself. This address cannot be assigned to individual devices.

What is an IP Broadcast?

The IP Broadcast address is the last address in a subnet's range. It is used to send data to all devices within that subnet.

How do you calculate the subnet mask for a given prefix?

The subnet mask is calculated based on the prefix length. For example, a prefix of /27 corresponds to a subnet mask of 255.255.255.224.

What is the role of the subnet mask in IP addressing?

The subnet mask defines the boundary between the network and host portions of an IP address, allowing devices to determine if an IP address belongs to the local network or a remote one.

How do you calculate the IP Network and Broadcast addresses?

The IP Network is calculated by identifying the first available address in a subnet, while the Broadcast address is the last available address. The range of IP addresses between these two values forms the usable host addresses.

What does a /27 prefix indicate in terms of the number of usable IP addresses?

A /27 prefix provides 32 total IP addresses, of which 30 are usable for devices (with 1 address reserved for the network and 1 for broadcast).

What are the steps to calculate the range of IP addresses in a subnet?

To calculate the range, identify the IP Network and Broadcast addresses, and then determine the range of usable IP addresses between them by excluding the network and broadcast addresses.

Why do we subtract 1 from the Broadcast IP when calculating the usable IP range?

The Broadcast address is the last address in the subnet and cannot be assigned to a device. Thus, we subtract 1 from the Broadcast address to find the highest usable IP address.