RFC 791 (IPv4)

RFC 791 is the official document that defines Internet Protocol version 4 (IPv4), which is a fundamental technology for the internet. IPv4 assigns unique addresses to devices so they can communicate and locate each other across networks. It breaks down data into packets, guiding how each packet is formatted, addressed, and routed from sender to receiver. This protocol enables devices like computers, phones, and servers to connect and exchange information reliably. Essentially, RFC 791 establishes the rules that allow devices to identify, find, and talk to each other within the global internet infrastructure.