A seven layer
7 refers to the OSI seven layer protocol model, are: application layer (the Application), presentation layer (the Presentation), session layer (the Session), transport layer (Transport), network layer (the Network), a data link layer (the Data
Link), physical layer (physical).
7 refers to the OSI seven layer protocol model, are: application layer (the Application), presentation layer (the Presentation), session layer (the Session), transport layer (Transport), network layer (the Network), a data link layer (the Data
Link), physical layer (physical).
Second, the five-layer
5 only OSI layer and TCP / IP integrated, model unofficial agreement arising out of the industry, but many specific applications. The practical application or TCP / IP four-layer structure. In order to facilitate the two layers can be referred to the network interface layer. Five-layer architecture comprising: an application layer, transport layer, network layer, data link layer and physical layer.
5 is not expanded layer model to explain, with reference to the content and functional layer 7, where the third party to make a corresponding integrated, as shown below:
5 only OSI layer and TCP / IP integrated, model unofficial agreement arising out of the industry, but many specific applications. The practical application or TCP / IP four-layer structure. In order to facilitate the two layers can be referred to the network interface layer. Five-layer architecture comprising: an application layer, transport layer, network layer, data link layer and physical layer.
5 is not expanded layer model to explain, with reference to the content and functional layer 7, where the third party to make a corresponding integrated, as shown below:
Third, the fourth layer
4 layer is a TCP / IP four-layer model, including: an application layer, transport layer, network interface layer and the Internet layer.
4 layer is a TCP / IP four-layer model, including: an application layer, transport layer, network interface layer and the Internet layer.
Relationship between layer 7 and the standard protocol layer protocol corresponding to the following diagram:
Fourth, the packets
from the top down, through each layer, it will do the protocol header above the hands and feet, to add something, sent to the receiver, and then out of some sort of relief layers, the following diagram:
from the top down, through each layer, it will do the protocol header above the hands and feet, to add something, sent to the receiver, and then out of some sort of relief layers, the following diagram:
Original Transfer: https: //www.cnblogs.com/tudachui/p/10971633.html
A seven layer
7 refers to the OSI seven layer protocol model, are: application layer (the Application), presentation layer (the Presentation), session layer (the Session), transport layer (Transport), network layer (the Network), a data link layer (the Data
Link), physical layer (physical).
7 refers to the OSI seven layer protocol model, are: application layer (the Application), presentation layer (the Presentation), session layer (the Session), transport layer (Transport), network layer (the Network), a data link layer (the Data
Link), physical layer (physical).
二、5层
5层只是OSI和TCP/IP的综合，是业界产生出来的非官方协议模型，但是很多具体的应用。实际应用还是TCP/IP的四层结构。为了方便可以把下两层称为网络接口层。五层体系结构包括：应用层、运输层、网络层、数据链路层和物理层。
5层模型不展开讲解，内容和功能参照7层的，这里把3者做一个综合的对应，如下图：
5层只是OSI和TCP/IP的综合，是业界产生出来的非官方协议模型，但是很多具体的应用。实际应用还是TCP/IP的四层结构。为了方便可以把下两层称为网络接口层。五层体系结构包括：应用层、运输层、网络层、数据链路层和物理层。
5层模型不展开讲解，内容和功能参照7层的，这里把3者做一个综合的对应，如下图：
三、4层
4层是指TCP/IP四层模型，主要包括：应用层、运输层、网际层和网络接口层。
4层是指TCP/IP四层模型，主要包括：应用层、运输层、网际层和网络接口层。
4层协议和对应的标准7层协议的关系如下图：
四、数据包
从上往下，每经过一层，协议就会在包头上面做点手脚，加点东西，传送到接收端，再层层解套出来，如下示意图：
从上往下，每经过一层，协议就会在包头上面做点手脚，加点东西，传送到接收端，再层层解套出来，如下示意图：
原文转自：https://www.cnblogs.com/tudachui/p/10971633.html