OSI Model

OSI Model

The Open Systems Interconnection (OSI) model (ISO/IEC 7498-1) is a product of the Open Systems Interconnection effort at the International Organization for Standardization. It is a prescription of characterizing and standardizing the functions of a communications system in terms of abstraction layers. Similar communication functions are grouped into logical layers. A layer serves the layer above it and is served by the layer below it.

For example, a layer that provides error-free communications across a network provides the path needed by applications above it, while it calls the next lower layer to send and receive packets that make up the contents of that path. Two instances at one layer are connected by a horizontal connection on that layer.

Read more about OSI Model:  History, Description of OSI Layers, Cross-layer Functions, Interfaces, Examples, Comparison With TCP/IP Model

Other articles related to "osi model, osi, model":

Covert Channel - Data Hiding in OSI Model
... They employ the OSI model as a basis for their development in which they characterize system elements having potential to be used for data hiding ... for data hiding in each of seven OSI layers are established ... cannot be fully justified in practice since the OSI model does not exist per se in functional systems ...
Layer 8
... used to refer to a nonexistent "user" or "political" layer on top of the OSI model of computer networking ... The OSI model is a 7-layer abstract model that describes an architecture of data communications for networked computers ... Layer 10 Government or legal compliance Since the OSI layer numbers are commonly used to discuss networking topics, a troubleshooter may describe an issue caused by a user to be a layer ...
Meter-Bus - Relation To The OSI Model
... The concept was based on the ISO-OSI Reference Model, in order to realize an open system which could utilize almost any desired protocol ... or session layer, the levels four to six of the OSI model are empty ... OSI Model Data unit Layer Standard Host layers Data 7 ...
... The Internet protocol suite (TCP/IP) and OSI model each specify a group of protocols and methods identified by the name application layer ... In the OSI model, the definition of its application layer is narrower in scope ... OSI specifies strict modular separation of functionality at these layers and provides protocol implementations for each layer ...
OSI Model - Comparison With TCP/IP Model
... In the TCP/IP model of the Internet, protocols are deliberately not as rigidly designed into strict layers as in the OSI model ... Even though the concept is different from the OSI model, these layers are nevertheless often compared with the OSI layering scheme in the following way The ... transport layer includes the graceful close function of the OSI session layer as well as the OSI transport layer ...

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