But now Ethernet is more used to refer to various local area networks using CSMA/CD technology. The frame format of Ethernet is consistent with IP, which is especially suitable for transmitting IP data. Ethernet has the advantages of simplicity, convenience, cheapness and high speed.
Previously, the physics circle thought that there was a very sparse medium in the universe and called it ether, but later experiments proved that there was no such thing as ether, because the word was a product at that time, just like many unscientific names before us, and it was caused before people discovered it artificially. Although it was later proved to be incorrect, these names were handed down for commemoration or other reasons.
Extended data
The original Ethernet used coaxial cables to connect various devices. The computer is connected to the cable through a transceiver called the Attachment Unit Interface (AUI).
Simple network cable is still very reliable for small networks. For large networks, the failure of a line or a connector will lead to instability of one or more segments of Ethernet.
Because all communication signals are transmitted on * * * lines, even if the information is sent to only one terminal (destination), the message sent by one computer will be received by all other computers.
Under normal circumstances, the network interface card will filter out the information not sent to it, and only when the destination address is its own information will it send an interrupt request to the CPU, unless the network interface card is in Promiscuous mode mode.
The characteristic of "one person says, everyone listens" is the security weakness of Ethernet, because a node on Ethernet can choose whether to monitor all the information transmitted on the line. * * * Shared cable means * * * shared bandwidth, so in some cases, the speed of Ethernet may be very slow, such as when all network terminals are restarted after power failure.
Baidu Encyclopedia-Ethernet