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Slide 1:

NETWORK LAYERS Two models for communication I.VINOTH b CA

TWO MODELS:

TWO MODELS Osi model 7 layered model TCP/IP model 4 layered model

Slide 3:

 describes a set of general design guidelines and implementations of specific networking protocols to enable computers to communicate over a network . LAYERED MODEL

OSI MODEL:

OSI MODEL International Standards Organization’s Open Systems Interconnection model

Slide 5:

The OSI Layered Model OSI – Open System Interconnection Layered Approach Allows better interoperability between software and hardware Allows design of elaborate but highly reliable protocol stacks

TCP/IP:

TCP/IP Developed by the US Department of Defense Advanced Research Project Agency(DARPA) In 1969

Slide 7:

The TCP/IP model, or Internet Protocol Suite , describes a set of general design guidelines and implementations of specific networking protocols to enable computers to communicate over a network

The four layers of DARPA are :

The four layers of DARPA are Transport Internet Network Interface Application

Slide 9:

TCP/IP layered network model Transmission Control Protocol and Internet Protocol A lso known as the Internet Protocol Suite Operation:- 1.Connection establishment 2.Data transfer 3.Disconnection Application Transport Internet Network access

Protocols :

Protocols  Defines the procedure to be used by systems involved  S et of rules that must be followed for devices to communicate

Slide 11:

A layer is a collection of conceptually similar functions that provide services to the layer above it and receives services from the layer below it. LAYER

Application Layer:

Application Layer Standard network services like HTTPtransfer files FTP  interactive file transfer TELNET logging on SMTPtransfer of mail messages

Slide 13:

Transport Layer Manages the transfer of data by using connection oriented and connectionless transport protocol

Internet Layer:

Internet Layer Manages addressing of packets and delivery of packets between networks

Network Interface Layer:

Network Interface Layer ->Delivers data via physical link( E thernet-protocol) ->Provides error detection and packet framing

Conclusion:

Conclusion TCP/IP provides end-to-end connectivity specifying how data should be formatted, addressed, transmitted, routed and received at the destination.

Slide 17:

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