Network Protocol Layer Structure & Technologies

Layer

Network

Interface

Internet

Transport

Application

Application

Presentation

Session

Transport

Network

Link

Physical

7

6

5

4

3

2

1

Technology

WDM (Layer 0)

SONET (Layer 1)

ATM (Layer 2)

IP (Layer 3)

TCP (Layer 4)

(Application Layer)

Routing/

Switching

Systems

Protocol

Layer

MAC

IP

TCP

HTTP Header

URL,Ref,Host,Cookie,…..

HTTP Payload

2 3 4 5 ------------------------------------------------------- 7

LAN

Switch

Router

Web

Switch

Application Switch

Overhead

Content

Message

Other Personalized

Information

OSI Model

Internet Model

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