TCP/IP

1. TCP/IP ( TRANSMISSION PROTOCOL / INTERNET PROTOCOL LAYER : IN TCP

LAYER WE HAVE 4 – LAYERS IN A COMBINATION OF OSI LAYERS.

1. APPLICATION.
2. PRESENTATION.
3. TRANSPORT.
APPLICATION LAYER.
( LAYER 1 )
4.TRANSPORT.
TRANSPORT LAYER.
( LAYER 2 )
5. NETWORK. INTERNET LAYER.
( LATER 3 )
6. DATA LINK.
7. PHYSICAL LAYER. NETWORK INTERFACE LAYER. ( LAYER 4 )


1. LAYER – 1 DEVICES : EXAMPLE FOR LAYER – 1 DEVICE IS HUB.

2. LAYER – 2 DEVICES : EXAMPLES FOR LAYER – 2 DEVICES ARE : -

A. BRIDGES.

B. SWITCHES.

3. LAYER – 4 DEVICES : ALL CABLE CONNECTORS COMES IN LAYER – 4.