ARCHITECTURE OF TCP

ARCHITECTURE OF TCP/IP

The internet is know to be a medium that relies on many communication systems. If you connect to the net from home, your data will travel across a phone line, whereas your computer work probably relies on a high-speed Ethernet.

    To provide this level of flexibility, TCP/IP on system of layers, each of which controls a single aspect of data transmission.

The architecture of TCP/IP is as follows,

 

                       

NETWORK LAYER

           

 

                                                                                       HOST

 

                                                                                                                                                                                                                        HOST             HOST              

In TCP/IP has four layers

1.    Application layer

2.    Transport layer

3.    Network layer

4.    Link layer

Data originating from the Application Layer has to move through four logical layers before being poured on the network wire or whatever medium is used to physically transmit information.

The Transport Layer takes care of the flow of data between two network hosts.

 The network layer controls how data is moved around in the network. For ex : it establishes what route a particular packet must follow to move from host A to host B , and provides a method for identifying hosts in a unique way.

            The link Layer sends and receives data over the physical medium chosen for the transmission of information .

The I

mportant part of this surprisingly simple                                   scheme is that every layer in the chain treats the information received from or destined to the higher level