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Internet Protocol (IP)

1974
  • Vint Cerf
  • Robert E. Kahn
Network operations center showcasing Internet Protocol management and data routing.

(generated image for illustration only)

Internet Protocol (IP) is the principal communications protocol in the Internet Layer for relaying datagrams across network boundaries. Its primary function is to deliver packets from a source host to a destination host based on their IP addresses. IP is a connectionless protocol that provides a best-effort delivery service, meaning it does not guarantee delivery, order, or data integrity.

The Internet Protocol’s design embodies the end-to-end principle. It provides a simple, universal addressing and packet forwarding service, leaving reliability to higher-level protocols like TCP. Each IP packet, or datagram, contains a header with crucial information, including the source and destination IP addresses, a Time-to-Live (TTL) field to prevent indefinite packet looping, and information about the protocol of the encapsulated data (e.g., TCP or UDP). Routers across the Internet inspect the destination IP address in each packet’s header to make forwarding decisions, consulting their routing tables to determine the next hop towards the final destination. This process is independent for each packet, meaning two consecutive packets from the same source to the same destination might take different routes. This design makes the network highly resilient to failures. The two main versions are IPv4, which uses a 32-bit address space, and its successor, IPv6, which uses a 128-bit address space to overcome IPv4 address exhaustion.

UNESCO Nomenclature: 3307
– Computer science

Type

Software/Algorithm

Disruption

Revolutionary

Usage

Widespread Use

Precursors

  • arpanet routing protocols
  • packet switching principles
  • the need for a universal internetworking protocol to connect disparate networks like arpanet, npl network, and satnet

Applications

  • routing data across the global internet
  • assigning unique logical addresses to devices (ipv4/ipv6)
  • forming the basis for all higher-level protocols like tcp and udp
  • voice over ip (voip)
  • network address translation (nat)

Patents:

NA

Potential Innovations Ideas

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Related to: ip, internet protocol, internet layer, ip address, routing, datagram, packet, best-effort delivery, connectionless, ipv4, ipv6.

Historical Context

Internet Protocol (IP)

1970
1970
1974
1974
1978
1980
1980
1970
1970
1972
1974
1975-06-01
1980
1980
1980

(if date is unknown or not relevant, e.g. "fluid mechanics", a rounded estimation of its notable emergence is provided)

Related Invention, Innovation & Technical Principles

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