OSI和TCPIP参考模型的⽐较
Now it's time to compare both the reference model that we have learned till now. Let's start by addressing the similarities that both of these models have.
现在该⽐较我们到⽬前为⽌所学的两种参考模型了。 让我们从解决这两个模型的相似之处开始。
Following are some similarities
similarities between OSI Reference Model and TCP/IP Reference Model.
以下是OSI参考模型和TCP / IP参考模型之间的⼀些相似之处
相似之处 。
Both have layered architecture.
两者都有分层的体系结构。
Layers provide similar functionalities.
层提供类似的功能。
Both are protocol stack.
两者都是协议栈。
Both are reference models.
两者都是参考模型。
OSI和TCP / IP参考模型之间的区别 (Difference between OSI and TCP/IP Reference Model) Following are some major differences between OSI Reference Model and TCP/IP Reference Model, with diagrammatic comparison below.
以下是OSI参考模型和TCP / IP参考模型之间的⼀些主要区别，下⾯是图表⽐较。
OSI(Open System Interconnection)TCP/IP(Transmission Control Protocol / Internet Protocol)
1. OSI is a generic, protocol independent standard, acting as a communication gateway between the network and end user.1. TCP/IP model is based on standard protocols around which the Internet has developed. It is a communication protocol, which allows connection of hosts over a network.
2. In OSI model the transport layer guarantees the delivery of packets.2. In TCP/IP model the transport layer does not guarantees delivery of packets. Still the TCP/IP model is more reliable.
3. Follows vertical approach.  3. Follows horizontal approach.
4. OSI model has a separate Presentation layer and Session
layer.
4. TCP/IP does not have a separate Presentation layer or Session layer.
5. Transport Layer is Connection Oriented.  5. Transport Layer is both Connection Oriented and Connection less.
6. Network Layer is both Connection Oriented and
Connection less.
6. Network Layer is Connection less.
7. OSI is a reference model around which the networks are
built. Generally it is used as a guidance tool.
7. TCP/IP model is, in a way implementation of the OSI model.
8. Network layer of OSI model provides both connection
oriented and connectionless service.
8. The Network layer in TCP/IP model provides connectionless service.
9. OSI model has a problem of fitting the protocols into
the model.
9. TCP/IP model does not fit any protocol
10. Protocols are hidden in OSI model and are easily
replaced as the technology changes.
10. In TCP/IP replacing protocol is not easy.
11. OSI model defines services, interfaces and protocols very clearly and makes clear distinction between them. It is 11. In TCP/IP, services, interfaces and protocols are not clearly separated. It is also protocol dependent.
protocol independent.
It is also protocol dependent.
12. It has 7 layers12. It has 4 layers
OSI(开放系统互连)TCP / IP(传输控制协议/ Internet协议)
1. OSI是⼀种通⽤的，独⽴于协议的标准，充当⽹络和最终⽤户之间的通信⽹关。1. TCP / IP模型基于Internet所围绕的标准协议。 它是⼀种通信协议，它允许通过⽹络连接主机。
2.在OSI模型中，传输层保证数据包的传递。  2.在TCP / IP模型中，传输层不保证数据包的传递。 TCP / IP模型仍然更可靠。
3.遵循垂直⽅法。  3.遵循⽔平⽅法。
4. OSI模型具有单独的表⽰层和会话层。  4. TCP / IP没有单独的表⽰层或会话层。
5.传输层是⾯向连接的。  5.传输层既⾯向连接⼜较少连接。
6.⽹络层既是⾯向连接的，⼜是较少连接的。  6.⽹络层连接少。
7. OSI是建⽴⽹络的参考模型。 通常，它⽤作指导⼯具。7.在某种程度上，TCP / IP模型是OSI模型的实现。
8. OSI模型的⽹络层提供⾯向连接和⽆连接的服务。8. TCP / IP模型中的⽹络层提供⽆连接服务。
tcpip协议pdf9. OSI模型存在将协议拟合到模型中的问题。9. TCP / IP模型不适合任何协议
10.协议隐藏在OSI模型中，随着技术的变化很容易被替换。10.在TCP / IP中，替换协议并不容易。
11. OSI模型⾮常清晰地定义了服务，接⼝和协议，并明确区分了它们。
它与协议⽆关。
11.在TCP / IP中，服务，接⼝和协议没有明确分开。 它也取决于协议。
12.它有7层12.它有4层
OSI参考模型和TCP / IP参考模型之间的图解⽐较 (Diagrammatic Comparison between OSI Reference Model and TCP/IP Reference Model)

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