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The Fast Local Internet Protocol (FLIP) is a communication protocol for LAN and WAN, conceived for distributed applications. FLIP was designed at the Vrije Universiteit Amsterdam to support remote procedure call (RPC) in the Amoeba distributed operating system. [1]
In the OSI model, FLIP occupies the network layer (3), thus replacing IP, but it also obviates the need for a transport layer (4) protocol like TCP.
| Layer | OSI | TCP/IP | FLIP |
|---|---|---|---|
| 7 | Application | User-defined | User-defined |
| 6 | Presentation | User-defined | Amoeba Interface Language (AIL) |
| 5 | Session | Not used | RPC and Group communication |
| 4 | Transport | TCP or UDP | Not needed |
| 3 | Network | IP | FLIP |
| 2 | Data Link | E.g., Ethernet | E.g., Ethernet |
| 1 | Physical | E.g., Coaxial cable | E.g., Coaxial cable |
FLIP is a connectionless protocol designed to support transparency (with respect to the underlying network layers of the OSI model: 2. data link and 1. physical), efficient RPC, group communication, secure communication and easy network management. The following FLIP properties helps to achieve the requirements of distributed computing: [1]
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