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Everything about Interface Message Processor

Computer network device

The Interface Message Processor (IMP) was the packet switching node used to interconnect participant networks to the ARPANET from the late 1960s to 1989. It was the first generation of gateways, which are known today as routers. An IMP was a ruggedized Honeywell DDP-516 minicomputer with special-purpose interfaces and software. In later years the IMPs were made from the non-ruggedized Honeywell 316 which could handle two-thirds of the communication traffic at approximately one-half the cost. An IMP requires the connection to a host computer via a special bit-serial interface, defined in BBN Report 1822. The IMP software and the ARPA network communications protocol running on the IMPs was discussed in RFC 1, the first of a series of standardization documents published by what later became the Internet Engineering Task Force (IETF). Wikipedia →

đź§­ Start here: a 6-step reading path

  1. Read the overview: Interface Message ProcessorA 5-minute orientation
  2. Skim a recent paper: Distributed Aerial Image Stitching on Multiple Processors using Message Passing InterfaceInfluential work since 2022
  3. Pick up a classic book: Modern Operating SystemsThe most-reprinted book on the subject
  4. Read the landmark paper: An optical interface message processor for fiber communication networksCited 2 times
  5. Go sideways: ARPANETA closely related topic
  6. Go sideways: End-to-end principleA closely related topic

đź“– Definitions

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🗂️ The subject at a glance

  1. History
  2. BBN Report 1822

🏆 Landmark papers (most cited)

🆕 Influential since 2022

📚 Books worth reading

Ranked by number of editions on Open Library, a rough measure of how lasting a book is.

đź”— Related topics