General Network Information; Network Protocol - Panasonic DP-3510 Service Manual

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9 General Network Information

OSI Reference Mode

Having a model in mind helps you understand how the pieces of the network puzzle fit together. The most

commonly used model is the Open System Interconnection (OSI) reference model. The OSI model, first

released in 1984 by the International Standards Organization (ISO), provides a useful structure for defining

and describing the various processes underlying networking communications.

The OSI model organizes communication protocols into seven layers. Layer 1, the Physical (Hardware)

layer, consists of protocols that deal with how data is transferred across the transmission media. At the

opposite end, Layer 7, the Application layer, interfaces the network services with the applications (software)

in use on the computer. The five layers in between, Data Link, Network, Transport, Session and

Presentation - perform intermediate communication tasks. In essence the OSI model is a framework that

describes how a function from one computer is transmitted to another computer on the network.

Presentation

NetBIOS, Windows, Sockets, etc...

IP, IPX, etc...

OSI Reference Model and Network Terms

DP-3510/3520/3530/4510/4520/4530/6010/6020/6030

ODI Driver, NDIS Driver

IP Address etc...

RS-232C, X21...

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