ISO(International Standards
Organisation)
OSI(Open System Interconnect)
OSI is a model developed by ISO which describes how data from application on one computer can be transferred to an application on another computer.
OSI(Open System Interconnect)
OSI is a model developed by ISO which describes how data from application on one computer can be transferred to an application on another computer.
All People Seem To Need Data Processing.
(Application,Presentation,Session,Transport,Network,DataLink,
Physical Layers.)
(Application,Presentation,Session,Transport,Network,DataLink,
Physical Layers.)
|
The Seven Layers of the OSI Model
|
||
|
Layer
|
Name
|
Description
|
|
1
|
Physical
|
Governs the layout
of cables and devices such as repeaters and hubs.
Eg:-Cables,
connectors, hubs, and repeaters
|
|
2
|
Data Link
|
Provides MAC
addresses to uniquely identify network nodes and a means for data to be sent
over the Physical layer in the form of packets. Bridges and switches are
layer 2 devices.
Eg:- MAC
address, CSMA/CD, switches, and bridges
|
|
3
|
Network
|
Handles routing of
data across network segments.
Eg:-IP, ICMP, ARP,
RIP, IGRP, and routers
|
|
4
|
Transport
|
Breaks information
into segments and is responsible for connection and connectionless
communication.
Eg:-TCP and UDP
|
|
5
|
Session
|
Establishes sessions
between network applications.
Eg:-NetBIOS
|
|
6
|
Presentation
|
Formats the
information so that it is understood by the receiving system.
Eg:-Compression and
encryption depending on the implementation
|
|
7
|
Application
|
Allows applications
to request network services.
Eg:-SMTP, DNS, HTTP,
and Telnet
|
No comments:
Post a Comment