323
10 General Network Information
10.1 Network Protocol
10.1.1
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 accross 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.
7
Application
Layer Name Function Protocol
6
Presentation
5
Session
4
Transport
3
Network
2
Datalink
1
Physical
NetBIOS, Windows, Sockets, etc...
SMB
SMTP
FTP
DNS
HTTP
Telnet
etc...
TCP/IP
IPX/SPX
Net BEUI
Apple Talk
etc...
Ethernet
Token Ring
FDDI
ATM
etc...
TDI
TCP, UDP
IP, IPX, etc...
PPP...
IP Address etc...
MAC Address
RS-232C, X21...
ODI Driver, NDIS Driver
Repeater
Hub
NIC
SW Hub
Router
OSI Reference Model and Network Terms
Summary of Contents for Panafax DX-2000
Page 2: ......
Page 27: ...27 9 1 Screw 19 10 Release two Latch Hooks 11 Remove the SNS Assembly 121 9 10 11 ...
Page 49: ...49 2 15 Screw Identification Template ...
Page 57: ...57 3 7 3 Option Cassette Circuit 555 748 728 744 928 953 730 731 731 952 944 930 931 931 ...
Page 58: ...58 3 7 4 LAN Control Circuit 522 CN50 1102 1104 1101 N C N C RD N C N C RD TD TD ...
Page 59: ...59 3 7 5 Page Description Language Printer Interface Kit ...