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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 calling in the Amoeba distributed operating system.[1] In the OSI model, FLIP occupies layer 3, thus replacing IP, but it also obviates the need for a transport-level protocol like TCP.
| Level | 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), group communication, secure communication and easy network management. The following FLIP properties helps to achieve the efficiency requirements:
- FLIP identifies entities called network service access points (NSAPs).
- FLIP uses a one way mapping between the “private” address, used to register an endpoint of a network connection, and the “public” address used to advertise the endpoint.
- FLIP routes messages based on NSAP.
- FLIP uses a bit in the message header to request transmission of sensitive messages across trusted networks.
See also
References
- ^ a b M. Frans Kaashoek, Robbert van Renesse, Hans van Staveren, and Andrew S. Tanenbaum. 1993. FLIP: an internetwork protocol for supporting distributed systems. ACM Trans. Comput. Syst. 11, 1 (Feb. 1993), 73–106. https://doi.org/10.1145/151250.151253
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