Ethernet Principle

Ethernet (English: Ethernet) is a computer local area network technology..

ethernet is Ethernet, a computer local area network technology.The IEEE 802.3 standard organized by IEEE has formulated the technical standard of Ethernet, which stipulates the content of the protocol including the connection of the physical layer, the electronic signal and the medium access layer.Ethernet is currently the most common LAN technology, replacing other LAN technologies such as Token Ring, FDDI and ARCNET.
①Token Ring
The Token Ring network was developed by IBM in 1984. It has been IBM's network standard for a long time and is supported by all computers produced by IBM.Token Ring can be a bridge or router to connect other networks.The Token Ring network is indeed a "ring" network in practical applications, but the star-shaped wiring can be realized due to the use of the so-called multi-station access unit equipment.

Token Ring is aLAN protocol, defined in IEEE 802.5, in which all workstations are connected to a ring, and each workstation can only transmit data with directly adjacent workstations.Stations are granted transmission rights through token information surrounding the ring.Token Ring is a network technology successfully developed by IBM in the early 1980s.It is called a ring because the physical structure of this network has the shape of a ring.
There are multiple stations on the ring connected to the ring one by one. There is a point-to-point link between adjacent stations, so the token ring is different from the broadcast Ethernet. It is a LAN that broadcasts to the next station in sequence..
Another attractive feature that differs from Ethernet is the deterministic response time even under heavy load.The standard that Token Ring follows is IEEE802.5, which specifies three operating rates: 1Mb/s, 4Mb/s and 16Mb/s.In the beginning, UTP cables can only operate at 1Mb/s, STP cables can operate at 4Mb/s and 16Mb/s, and there are now breakthroughs in products from many manufacturers