The TCP/IP model was adopted and condensed into 4 Layers.
1. Link layer ( Layer 1and 2 of the OSI model)
2. internet Layer (Layer 3 of the OSI model)
3. Transport ( Layer 4, 5 and 6 of the OSI model)
4. Application ( Layer 7 of the OSI model)
http://en.wikipedia.org/wiki/TCP/IP_model#Link_Layer
Four layer, those are 1. Process or Application. 2. Host to Host or Transport 3. Internet
4. Link layer
The Transport layer
The tcp layer
transport
Transport layer
TCP and UDP are transport layer protocols; the OSI layer is layer 4 (transport)
transport
Transport layer TCP/IP Protocols are TCP and UDP
tcp is the transport control protocol and ip is the internet protocol. tcp is concerned with guaranteed delivery of packets from source to destination, while ip is the protocol used to actually deliver packets. tcp is located at layer 4 of the osi model, or the transport layer. ip is located at layer 3 of the osi model, or the network layer. check out the video tutorials in the link below.
Network Interface Layer
signaling
TCP/IP protocols are implemented by software, except for the bottom physical layer, which is implemented in hardware.
What is the purpose of the TCP/IP Network Access layer