Fast Local Internet Protocol: Difference between revisions

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{{More citations needed|date=February 2013}}

The '''Fast Local Internet Protocol''' ('''FLIP''') is a [[communication protocol]] for [[Local area network |LAN]] and [[wide area network |WAN]], conceived for [[distributed computing |distributed applications]]. FLIP was designed at the [[Vrije Universiteit Amsterdam]] to support [[remote procedure call |remote procedure call (RPC)]]ing in the [[Amoeba (operating system)|Amoeba]] [[distributed operating system]].<ref name="FLIP">[[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</ref>

In the [[OSI model]], FLIP occupies [[Network layer|layer 3]], thus replacing [[Internet Protocol|IP]], but it also obviates the need for a transport-level protocol like [[Transmission Control Protocol|TCP]].

==Comparison to TCP/IP==

In the [[OSI model]], FLIP occupies the [[Network layer |network layer (3)]], thus replacing [[Internet Protocol|IP]], but it also obviates the need for a [[Transport layer |transport-level layer (4)]] protocol like [[Transmission Control Protocol|TCP]].

{| class="wikitable"

|+ Layers of functionality in OSI, TCP/IP, and FLIP.<ref name="FLIP"/>

! LevelLayer !! OSI !! TCP/IP !! FLIP

|-

| 7 || Application || User-defined || User-defined

Line 21 ⟶ 23:

| 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:

==Properties==

*FLIP identifies entities called network service access points (NSAPs); i.e., contrary to the IP protocol, an [[Address space |address]] identifies a [[Process (computing) |process]], not a [[Host (network) |host]].<ref name="FLIP"/>

FLIP is a [[Connectionless communication |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 efficiency requirements of distributed computing:<ref name="FLIP"/>

*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 (transparency).

# FLIP identifies entities with a ___location-independent 64-bit identifier called ''Network Service Access Points'' (NSAPs). An entity can, for example, be a [[Process (computing) |process]]; contrary to the IP protocol where an [[IP address]] identifies a [[Host (network) |host]].

*FLIP uses a bit in the message header to request transmission of sensitive messages across trusted networks.

*# 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 (transparency).

# FLIP discovers routes on demand.

*# FLIP uses a bit in the message header to request transmission of sensitive messages across trusted networks.

==See also==