Zero-Knowledge IPv4 Subnet Calculator Built in Client-Side JavaScript

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A new tool allows network professionals to perform subnet calculations completely within their web browser. It is designed for tasks like planning VPCs or configuring firewalls without sending sensitive data to external servers. The calculator uses JavaScript to convert IP addresses into 32-bit integers for processing. This client-side approach ensures private corporate network data, like internal IP ranges, is never transmitted over the internet. The method relies on bitwise operations to determine network addresses, broadcast addresses, and host counts.

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