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Xiaobian to share with you what is the basic topology of Ethernet, I believe that most people do not know much about it, so share this article for your reference, I hope you will learn a lot after reading this article. Let's learn about it!

The topology of Ethernet is "bus". The topology adopted by Ethernet is basically bus type, and the bus topology uses a single cable trunk as the common transmission medium, and all computers in the network are directly connected to the shared bus through the corresponding hardware interfaces and cables. the bus topology needs to ensure that there is no conflict when the data is finally sent.

The topology adopted by Ethernet is basically "bus".

The bus topology uses a single transmission as a common transmission medium, which connects all the computers in the network directly to the shared bus through the corresponding hardware interface and cable. The problem to be solved in using a bus topology is to ensure that end users do not have conflicts when using media to send data.

In the point-to-point link configuration, if the link is half-duplex, it is only necessary to use a simple mechanism to ensure that the two users work in turn. In the point-to-multipoint mode, access to the line is determined by inquiring on the control side.

Advantages and disadvantages of Ethernet topology

Advantages:

1. The network structure is simple and easy to expand.

2. Less equipment, low cost, easy to install and use

3. It has high reliability. Because the failure of a single node does not involve the entire network.

Disadvantages:

1. The bus transmission distance is limited, and the communication range is limited.

2. Fault diagnosis and isolation are difficult. Fault isolation is difficult. When the node fails, it is convenient to isolate, and once the transmission medium fails, the whole bus needs to be cut off.

3. Data collisions are easy to occur, and the phenomenon of line contention is serious.

4. The distributed protocol can not guarantee the timely transmission of information and does not have real-time function, so the site must have the function of media access control, thus increasing the hardware and software overhead of the site.

Communication Protocol of Ethernet

The more general Ethernet communication protocol is the TCP/IP protocol. Compared with the open interconnection model ISO, the TCP/IP protocol adopts a more open way. It has been recognized by the US Department of Defense and widely used in practical projects. TCP/IP protocol can be used in a variety of channels and underlying protocols (such as T1, X.25 and RS-232 serial interfaces). Specifically, TCP/IP protocol is a group of protocols including TCP protocol, IP protocol, UDP (User Datagram Proto-c01) protocol, ICMP (Internet Control Message Protoc01) protocol and other protocols.

The TCP/IP protocol does not fully conform to the seven-layer reference model of OSI. The traditional open systems interconnection reference model is a seven-layer abstract reference model of communication protocols, in which each layer performs a specific task. The purpose of this model is to make all kinds of hardware communicate with each other at the same level. On the other hand, the TCP/IP communication protocol adopts a four-layer structure, and each layer calls the network provided by its next layer to complete its own requirements. The four layers are:

(1) Application layer: the layer of communication between applications, such as simple email transfer Protocol (SMTP), File transfer Protocol (FTP), Network remote access Protocol (Telnet), etc.

(2) Transport layer: in this layer, it provides data transfer services between nodes, such as Transmission Control Protocol (TCP), user packet Protocol (UDP), etc. TCP and UDP add transmission data to the packet and transmit it to the next layer. This layer is responsible for transmitting the data and determining that the data has been delivered and received.

(3) Network layer: responsible for providing basic packet delivery functions so that each packet can reach the destination host (but does not check whether it is received correctly), such as Internet Protocol (IP).

(4) Interface layer: the management of the actual network media, defining how to use the actual network (such as Ethernet, Serial Line, etc.) to transmit data.

These are all the contents of the article "what is the basic topology of Ethernet?" Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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