After the seven-layer OSI model and the TCP / IP model pictured above comparison chart, TCP / IP model is actually first proposed TCP / IP protocol stack, it is summarized as TCP / IP reference model summarized person. Currently, TCP / IP reference model is a practical application of the reference model.
Similarities between the two
- Have stratified
- They are based on the concept of a separate protocol stack
- It can be heterogeneous network interconnection
The differences between the two
- OSI definition of three things: services, protocols, interfaces, TCP / IP is not the beginning of design concept
- OSI appears first protocol reference model prior to disclosure, is not biased toward a specific protocol
- TCP / IP was designed with taking into account the heterogeneous network interconnection issues, the level of IP as an important
- The fourth point Figure
Five-layer reference model
Five-layer reference model is a combination of OSI and TCP / IP reference model advantages, is a model of a computer network in order to facilitate learning and the use of the principle. 
The layers of data units corresponding to the following name:
Application layer: packets
Transport Layer: segment
Network layer: datagrams
Data link layer: a frame
Physical layer: bit
Notes are summarized in kingly class network, authorized license
