SUBNETTING IP Address Untuk Nembak Wifi dan Topologi Jaringan [ PASTI BISA ]

Summary

In this video, Nanang MRK provides a comprehensive tutorial on subnetting, focusing on the practical application of IP addressing and subnet masks in real-world scenarios. He explains the concept of binary numbers, the structure of IP addresses, and how subnetting works, particularly with Class C IPs. With hands-on examples and clear calculations, Nanang walks through finding IP networks, broadcast addresses, host IP ranges, and subnet masks using Mikrotik. The tutorial is designed to make subnetting accessible for all learners, from beginners to those looking to refine their skills.

Takeaways

• 😀 Understanding the function of subnetting in real life is crucial for remembering and applying it effectively.
• 😀 Binary numbers (1 and 0) form the foundation of computer communication, which is essential for understanding IP addresses.
• 😀 Class C IP addresses are frequently used in private networks and subnetting, making them highly relevant for practical networking.
• 😀 A subnet mask and IP network prefix (e.g., /25) help define the IP range and the network structure for devices.
• 😀 To solve subnetting problems, it's important to memorize key numbers: 24, 28, and 32 as they correspond to different subnet sizes.
• 😀 The number of IP addresses in a subnet is calculated by multiplying or dividing by 2 depending on whether the prefix increases or decreases.
• 😀 IP Network, Broadcast IP, Host IP, and Subnet Mask are essential elements in subnetting and network configuration.
• 😀 The 'Host IP' refers to the range of usable IP addresses within a subnet that can be assigned to devices, often referred to as an 'IP pool'.
• 😀 Subnetting calculations can be performed on tools like MikroTik, with the DHCP server configuration showing usable IP ranges.
• 😀 To find the next IP address after a subnet, simply add 2 to the last usable host IP address. This is called the 'Next IP'.

Q & A

What is subnetting?

Subnetting is the process of dividing a larger network into smaller, more manageable subnetworks (subnets) to optimize network performance, security, and efficient IP address allocation.

Why is it important to understand binary numbers in networking?

Binary numbers are crucial because computers and networking equipment communicate using binary (0s and 1s). Understanding binary helps explain how devices process and recognize IP addresses and other data.

What is an IP address composed of?

An IP address consists of a 32-bit number, which is divided into four 8-bit segments, typically represented in decimal format, such as 192.168.1.240.

What are the common prefixes used in Class C IP subnetting?

In Class C IP subnetting, common prefixes include /24, /25, /26, /27, /28, /29, and /30, which dictate the number of available IP addresses in the subnet.

How do you calculate the number of IPs in a subnet?

To calculate the number of IPs, you can use a simple rule: as the prefix gets larger (e.g., from /24 to /25), the number of available IPs halves. Conversely, as the prefix gets smaller, the number of IPs doubles.

What does the /25 prefix represent in terms of IPs?

The /25 prefix indicates that there are 128 available IP addresses in the subnet, as it uses 25 bits for the network portion of the IP address.

What is the formula to calculate the IP Network?

To calculate the IP Network, divide the last segment of the IP address by the number of IP addresses indicated by the prefix. For example, for 192.168.1.240/25, divide 240 by 128, resulting in 192.168.1.128 as the IP Network.

How do you calculate the Broadcast IP?

The Broadcast IP is calculated by adding the number of IP addresses in the subnet to the IP Network and then subtracting 1. For example, for a /25 prefix, the Broadcast IP is 192.168.1.255.

What are Host IPs and how are they calculated?

Host IPs are the usable IP addresses in a subnet. To calculate the range, the first Host IP is IP Network + 1, and the last Host IP is Broadcast IP - 1. For example, for a /25 prefix, the Host IP range is 192.168.1.129 to 192.168.1.254.

What is the Subnet Mask for a /25 prefix?

The Subnet Mask for a /25 prefix is 255.255.255.128, as it uses 25 bits for the network portion of the IP address and leaves 7 bits for the host portion.