

According to the network topology, Ethernet is a bus network structure. The standard topology of Ethernet is a bus topology, but Fast Ethernet (100BASE-T, 1000BASE-T standards) uses switches to connect and organize the network in order to reduce conflicts and maximize network speed and efficiency. As a result, the topology of Ethernet becomes a star; but logically, Ethernet still uses bus topology and CSMA/CD bus technology.
The operating environment of this tutorial: Windows 7 system, Dell G3 computer.
Ethernet (Ethernet) belongs to the bus network structure according to the network topology.
Ethernet is a computer local area network technology. The IEEE 802.3 standard of the IEEE organization formulates the technical standard of Ethernet, which specifies the content including physical layer wiring, electronic signals and media access layer protocols. Ethernet is the most commonly used LAN technology, replacing other LAN technologies such as Token Ring, FDDI and ARCNET.
The bus network structure is a topology based on multi-point connections, which directly connects all devices in the network to a common transmission medium through corresponding hardware interfaces. A bus topology uses a common channel that is accessible to all computers, with only one cable attached to each computer. In the bus topology, all online microcomputers are directly connected to the bus through corresponding hardware interfaces. The information of any node can be transmitted and diffused in two directions along the bus, and can be accessed by any node in the bus. take over. Because its information is spread around, similar to a radio station, the bus network is also called a broadcast network. The bus has a certain load capacity, so the length of the bus is limited, and a bus can only connect a certain number of nodes.
The bus topology is suitable for local area networks with a relatively small number of computers. Usually the transmission rate of this kind of local area network is 100Mbps, and coaxial cables are used for network connections. It is mainly suitable for places with small network sizes such as homes and dormitories. Bus-type topology has been popular for a period of time. A typical bus-type LAN is Ethernet.
The standard topology of Ethernet is a bus topology, but Fast Ethernet (100BASE-T, 1000BASE-T standards) will improve network speed and efficiency in order to reduce conflicts. Maximize, use switches for network connectivity and organization. As a result, the topology of Ethernet becomes a star; but logically, Ethernet still uses bus topology and CSMA/CD (Carrier Sense Multiple Access/Collision Detection). bus technology.
Ethernet realizes the idea of multiple nodes in a radio system on the network sending information. Each node must obtain a cable or channel to transmit information, sometimes also called Ether. (The name comes from the electromagnetic radiation medium hypothesized by 19th-century physicists - optical ether. Later research proved that optical ether does not exist.) Each node has a globally unique 48-bit address, which is the MAC address assigned to the network card by the manufacturer. , to ensure that all nodes on the Ethernet can identify each other. Because Ethernet is so common, many manufacturers integrate Ethernet cards directly into computer motherboards.
Bus topology is widely used in local area networks. Its main advantages are as follows:
(1) Easy wiring and small cable consumption. The nodes in the bus-type network are connected to a common communication medium, so the required cable length is short, which reduces installation costs and is easy to wire and maintain.
(2) High reliability. The bus structure is simple and from a hardware point of view, it is very reliable.
(3) Easy to expand. In a bus-type network, if you want to increase the length, you can add an additional segment through a repeater; if you need to add a new node, you only need to connect it at any point on the bus.
(4) Easy to install. The installation of bus-type network is relatively simple and the technical requirements are not very high.
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