Internet Experiment Note

Internet Experiment Note. The Internet Experiment Note was a series of technical and procedural documents published during the early development of the ARPANET and the nascent Internet. These documents served as a primary means of sharing research, experimental results, and protocol specifications among the small community of engineers and scientists working on the network. The series was instrumental in the collaborative design process that led to foundational Internet standards, preceding the establishment of the modern Request for Comments system.

History and purpose

The series was initiated in 1977 by researchers at the Information Sciences Institute and other key sites involved with the Defense Advanced Research Projects Agency internetworking program. Its primary purpose was to document the ongoing experiments and design discussions for the Transmission Control Protocol and Internet Protocol suite, which were being developed by pioneers like Vint Cerf and Bob Kahn. The documents facilitated peer review and coordination between major research institutions such as Stanford University, Bolt, Beranek and Newman, and the University College London. This process was crucial for refining concepts like gateway architecture and packet switching in a pre-standardization environment before the formation of the Internet Architecture Board.

Format and structure

An IEN was typically a plain-text document distributed via the ARPANET itself, often using the File Transfer Protocol or electronic mail. Each document was assigned a sequential number and included standard header fields for the title, authors, date, and a brief abstract. The content ranged from detailed protocol specifications and software descriptions to meeting notes and philosophical essays on network design, such as discussions surrounding the End-to-end principle. This informal yet structured format allowed for rapid dissemination and iteration of ideas among the tightly-knit research community, contrasting with more formal academic journals like those published by the Association for Computing Machinery.

Notable examples

Several IENs documented pivotal proposals and implementations that shaped the Internet's core protocols. IEN 2, for example, outlined the original design of the Transmission Control Program by Vint Cerf and Bob Kahn. IEN 46 detailed the specifications for the User Datagram Protocol, providing a simpler alternative to TCP for certain applications. Other significant documents included analyses of network congestion and performance on the ARPANET, as well as early work on network email standards that would influence later Request for Comments like those for Simple Mail Transfer Protocol. These documents collectively formed the experimental bedrock for the Internet protocol suite.

Role in Internet development

The series played a critical role as the living laboratory notebook for the Internet research community during a period of intense innovation. It allowed for the open documentation of both successes and failures in internetworking experiments conducted across the ARPANET, the Atlantic Packet Satellite Network, and the Packet Radio Network. This transparent process enabled rapid consensus-building on technical issues, directly feeding into the subsequent Request for Comments process managed by the Internet Engineering Task Force. The collaborative culture established by the IEN series is considered a direct precursor to the open standards model championed by the Internet Society.

Legacy and successor documents

The publication of IENs effectively ceased around 1982 as the Request for Comments series, under the stewardship of Jon Postel at the Information Sciences Institute, became the dominant and official venue for Internet standards. The final IENs were transitioned into the RFC numbering system, with their historical content archived as part of the permanent record of Internet development. The ethos of open technical documentation and iterative design pioneered by the IENs remains a cornerstone of the IETF's work today, influencing later frameworks for protocol development and the creation of documents like Internet-Drafts.

Category:Internet standards Category:Internet history Category:Technical communication