Binary for Networking: Subnet Masks, CIDR, and IPs
Apply binary arithmetic to networking. Calculate subnet masks, CIDR ranges, broadcast addresses, and wildcard masks step by step.
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Tags: developer-tools, binary, networking
Binary for Networking: Subnet Masks, CIDR, and IP Addresses Explained Every IP address, every subnet mask, every routing decision in a network is ultimately a binary operation. When a router decides whether to forward a packet to via the local interface or the default gateway, it's doing binary AND operations on 32-bit integers. Understanding the binary math behind IPv4 addressing makes subnetting intuitive rather than a memorization exercise. This article covers IP address binary representation, subnet masks, CIDR notation, and how to calculate network/broadcast addresses. --- IPv4 Addresses in Binary An IPv4 address is a 32-bit integer, written as four decimal octets separated by dots. Each octet is one byte — a value from 0 to 255. Converting to binary is straightforward: each octet is…
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