7 layers of Networking (OSI Layer)

OSI Layer – Open System Interconnection

7 layers of OSI Layer.

Protocol	OSI Layer	Devices
FTP,HTTP,SMTP,TELNET	Application	Gateway
Mpeg, Jpeg & Other Movie Format.	Presentation	Gateway
SQL,NFS,ASP	Session	Gateway
TCP,SPX,UDP	Transport	Gateway
ICMP,RIP,OSPF,IGRP,EIGRP	Network	Router, Brouter
Token ring, FDDI,PAP,CHAP	Data link	Switch, Bridge
X	Physical	Cables, Repeater,Hub

Function Of OSI Layer :

Physical Layer : Maintained Connectivity
Data Link  Layer : MAC (Media Access Control).
     LLC (Logical Link Control).
                            1) To maintain with MAC Address.
     2) Error Checking the Frame.
Network Layer : Inter-Networking & Routing.
Transport Layer : 1) End to End. Connection Maintain.
                            2) Data Delivery Maintainer.
Session layer : 1) Error Correction
2) Dialog Control
Presentation Layer : 1) Data Presentation
        2) Data Processing
        3) Encryption & Description
Application Layer : Data Application & Connection with other model to data sending.

DATA	FORMATION
Physical	Bit
DataLink	Frame
Network	Packet
Transport	Segment
Session	Data
Presentation	Data
Application	Data