what is ethernet

Ethernet is the most common type of computer network in the real world. 

There are two types of Ethernet: the first is classic Ethernet, and the second is switched Ethernet, which uses a device called a switch to connect different computers. 

Classic Ethernet is the original form of Ethernet, running at speeds ranging from 3 to 10 Mbps; switched Ethernet is the widely used Ethernet, which can run at high speeds such as 100, 1000, and 10000 Mbps, respectively. network, Gigabit Ethernet and 10 Gigabit Ethernet. 

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. In this way, the topology of Ethernet becomes star; but logically, Ethernet still uses bus topology and CSMA/CD (Carrier Sense Multiple Access/Collision Detection, that is, carrier multiple access/collision detection). bus technology.

Ethernet implements the idea of multiple nodes in a radio system on a network sending information. Each node must acquire a cable or channel to transmit information, sometimes called Ether.

 (The name comes from the electromagnetic radiation medium assumed by physicists in the 19th century - 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 ubiquitous, many manufacturers integrate Ethernet cards directly into computer motherboards.

The article comes from the Internet, if there is any infringement, please contact us to delete it.