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Introduction to Model Open Systems Interconnection (OSI)

Model Open Systems Interconnection (OSI) was created by the International Organization for Standardization (ISO) that provides a logical framework Structured how processes interact via a data communications network. Standards were developed for the computer industry can communicate on different networks efficiently.

OSI Layer Model

There are seven layers in the OSI model. Each layer is responsible for a particular in the process of data communication. For example, one layer may be responsible for establishing connections between devices, while another layer is responsible to correct the "errors" during the data transfer process takes place.
Layers of the OSI model is divided into two groups: "upper layer" and "lower layer". "Upper Layer" focus on user applications and how to file represented in the computer. For Network Engineers, a major part of
became the focus is on "lower layer". Lower layer is the essence actual data communication over a network.

"Open" in OSI "
"Open" in the OSI network model is to declare that conduct regardless of the hardware interconnect / "hardware" is used, all in accordance with standard communications software. It is notdirect cause "modularity" (can be dismantled pairs).

Modularity
"Modularity" refers to the exchange of protocol at a certain level without affecting or damaging relationships or functions of other levels. In a layer, protocol interchangeable, and allows communication continues. This exchange took place based on the hardware"hardware" from different vendors and a variety of reasons or a desire different.

next post I will discuss about OSI layer model. thanks you very much.