Web-Based IP Address Scheme Calculator

This is a simple, client-side web application for calculating IP addressing schemes. It allows you to input a network IP and subnet mask, and optionally request calculations based on a desired number of subnets or a desired number of devices per subnet.

Features

• Calculates Network ID, Broadcast ID, Subnet Mask, Usable Host Range, and Number of Usable Hosts for a given IP and mask.
• Subdivide a network based on a desired number of subnets.
• Calculate the required subnet size based on a desired number of devices per subnet, and list resulting subnets.
• Input validation and clear error messages.
• Client-side calculations (no server-side processing needed).

How to Use

1. Clone or download the repository.
2. Open the index.html file in any modern web browser.
3. Fill in the input fields:
   • IP Address: Enter a valid IPv4 address (e.g., 192.168.1.0). This can be any IP within the network; the tool will determine the network ID.
   • Subnet Mask: Enter the subnet mask for the IP address. This can be in dotted decimal format (e.g., 255.255.255.0) or CIDR prefix format (e.g., /24).
   • Number of Desired Subnets (Optional): If you want to divide the above network into a specific number of smaller subnets, enter the count here.
   • Number of Desired Devices per Subnet (Optional): If you want to create subnets that can each support a specific number of devices, enter that count here. Note: Do not fill both "Number of Subnets" and "Number of Devices" at the same time.
4. Click the "Calculate" button.
5. The results will be displayed below the form.

Technologies Used

• HTML
• CSS
• JavaScript (ES6+)

Files

• index.html: The main HTML file containing the structure of the calculator.
• style.css: Contains the CSS rules for styling the application.
• script.js: Contains all the JavaScript logic for IP calculations and interactivity.