Ethernet Ethernet, token ring network, ATM network, FDDI network can be counted as one category, classified according to transmission technology , and belong to the data link layer of the OSI reference type
Ethernet : It refers to a bus-type network. Its name is derived from optics
(scientists imagined a substance called ether). Everyone in the network shares an information channel. Everyone has to wait to transmit data. Only when the network is idle information can be sent.
Token Ring Network : A simple point of understanding is that if you want to send information, you must obtain something called a token. The token bus arranges each workstation in a bus or tree network in a certain order (such as by the size of the interface address). Forming a logical ring, only the token holder can control the bus and have the power to send information.
For example
, Ethernet communicates in such a way that every computer on the same backbone can send a string of messages to the backbone. * If it is a, it first monitors whether there is anyone sending a message on the main line, if there is it, it will wait for a while, and it will speak after it finds that no one is speaking, but it is possible that another computer is also speaking at the same time as it. (imagine having two students in a class asking questions to the teacher at the same time) so they both stop speaking at the same time and resume speaking after waiting a random time, of course their random times are different and still need to listen before speaking again Whether other hosts are speaking on the trunk. Other computers read the data packets, check the mac address, ip address and even port number to see if they are sent to themselves, if not, they will be discarded. Its mac algorithm is (Carrier Sense Multiple Access for Collision Detection) csma/cd algorithm*