ARPANET, the Advanced Research Projects Agency Network, was an experimental computer network funded by the US Department of Defense, whose first node went live at UCLA in 1969, connecting four university research sites by the end of that year. It was the first network to use packet switching, breaking messages into independently routed pieces, at wide scale, and the protocols and lessons learned running it directly shaped the design of the modern internet that eventually replaced it.
Facts
SignificanceThe first large scale packet switched network, and the direct ancestor of the modern internet. 2 FAQs
What were the interface message processors on the ARPANET?
Machines placed in front of the major computers that evolved into today's routers.
They were the machines that sat in front of each major computer on the network and handled its connection to the others. Wesley Clark suggested the arrangement at a 1967 conference convened by Larry Roberts, and the processors were called IMPs. They evolved into today's routers.
What was MILNET?
The classified military network split off from the ARPANET in 1983.
MILNET was the classified military network created when the Defense Communications Agency split the ARPANET in January 1983 into a public ARPANET and a classified MILNET. Only 45 hosts remained on the ARPANET after the split. The same month the ARPANET standardized on the TCP/IP protocols adopted by the Department of Defense.
Connections
Associated With
Source Wikipedia: Client-server model
Source Wikipedia: Distributed Computing
Source Wikipedia: Leonard Kleinrock
Davies's packet switching concepts and designs were incorporated into the ARPANET.
Source Wikipedia: Packet Switching
Robert Kahn, Pioneers Robert Kahn worked at Bolt Beranek and Newman on the Interface Message Processor subnetwork that connected ARPANET's early nodes, before his later work with Vint Cerf on TCP/IP.
Source Wikipedia: Robert Kahn
TCP/IP, Systems The ARPANET migrated from NCP to TCP/IP, completed on the 1 January 1983 flag day.
Source Wikipedia: Internet Protocol Suite
In Field
Source Computer History Museum
Predecessor Of
Source Computer History Museum
Sources
1. Wikipedia: ARPANET
WikipediaLead section
The Advanced Research Projects Agency Network (ARPANET) was the first wide-area packet-switched network with distributed control and one of the first computer networks to implement the TCP/IP protocol suite.
Lead sentence
Advanced Research Projects Agency Network (ARPANET) was the first wide-area packet-switched network with distributed control and one of the first computer networks to implement the TCP/IP protocol suite.
Article text
The ARPANET project was formally decommissioned in 1990.
View the Source 2. Computer History Museum
Wikidata: ARPANET
Wikidata Q177524, resolved via en.wikipedia pageprops (wave rule R-L)View the Source Wikipedia: Packet Switching
Wikimedia FoundationAssociated With: Packet Switching, History sectionQuote, Associated With: Packet Switching, History section
Immediately after SOSP, he [Roberts] incorporated Davies' concepts and designs for packet switching to enable the data communications on the network.
Wikipedia: Internet Protocol Suite
Wikimedia FoundationAssociated With: TCP/IP, Adoption sectionQuote, Associated With: TCP/IP, Adoption section
The migration of the ARPANET from NCP to TCP/IP was officially completed on flag day January 1, 1983, when the new protocols were permanently activated.
Wikipedia: Robert Kahn
Wikipedia: Client-server model
Wikimedia FoundationAssociated With: Client-Server Model, Early historyQuote, Associated With: Client-Server Model, Early history
While formulating the client-server model in the 1960s and 1970s, computer scientists building ARPANET (at the Stanford Research Institute) used the terms server-host (or serving host) and user-host (or using-host), and these appear in the early documents RFC 5 and RFC 4.
Wikipedia: Distributed Computing
Wikimedia FoundationAssociated With: Distributed Computing, History sectionQuote, Associated With: Distributed Computing, History section
ARPANET, one of the predecessors of the Internet, was introduced in the late 1960s, and ARPANET e-mail was invented in the early 1970s.
Wikipedia: Leonard Kleinrock
Wikimedia FoundationAssociated With: Leonard Kleinrock, Lead sectionQuote, Associated With: Leonard Kleinrock, Lead section
In the late 1960s and 1970s, he played an influential role in the development of the ARPANET.
Wikipedia, History of the Internet (source)
In Group: Pre-Internet Packet-Switched Research Networks, ARPA awarded contracts in 1969 for ARPANETView the Source Reader Challenges (0)
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