| ARPANET | … |
|---|---|
| ARPANET logical map, March 1977 | … |
| Type | Data |
| Location | • United States • United Kingdom • Norway |
| Protocols | • Layers 1-3: 1822 protocol (IMP-host), internal/undocumented (IMP-IMP) • Layers 4+: NCP , later TCP/IP |
| Operator | Defense Information Systems Agency (from 1975) |
| Established | 1969 |
| Closed | 1990 |
| Commercial? | No |
| Funding | DARPA (from 1966) |
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