Fast Local Internet Protocol: Difference between revisions

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

The '''Fast Local Internet Protocol''' ('''FLIP''') is a suite[[communication ofprotocol]] for [[InternetLocal protocolarea suite|internetnetwork protocols|LAN]], whichand provide[[wide Securityarea transparencynetwork |WAN]], securityconceived andfor network[[distributed managementcomputing |distributed applications]]. FLIP was designed at the [[Vrije Universiteit Amsterdam]] in 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). [http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.100.5689 FLIP: an internetwork protocol for supporting distributed systems]. ACM TransactionsTrans. onComput. ComputerSyst. Systems '''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==

FLIP is a connectionless protocol designed to support transparency, group communication, secure communication and easy network management. The following FLIP properties helps to achieve the efficiency requirements:

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]].

*FLIP identifies entities called network service access points (NSAPs).

{| class="wikitable"

*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.

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

*FLIP routes messages based on NSAP.

! Layer !! OSI !! TCP/IP !! FLIP

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

|-

| 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

|}

==Properties==

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 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 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==

{{portal|Computer networking|Computer Science}}

* [[IL (network protocol)]]

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