Starting Ethernet only 10Mbps throughput, using a carrier-interception multi-channel access control method with Collision detection (CSMA/CD,Carrier Sense Multiple Access/Collision Detection). This early 10Mbps Ethernet called standard Ethernet, Ethernet can use coarse coaxial cable, thin coaxial cable, non-shielded twisted pair, shielded twisted pair and fiber optic transmission medium to connect. And in IEEE 802.3 standards, different physical layer standards are developed for different transmission mediums, the number in front of these standards indicates the transmission speed, the unit is "Mbps", the last number indicates the length of a single segment of the network cable (the benchmark unit is 100m), the base represents "baseband" meaning, Broad represents "broadband".
• 10Base-5 use 0.4 inches in diameter, impedance 50 Ω coarse coaxial cable, also known as coarse cable Ethernet, the maximum length of the network segment is 500m. Baseband transmission method, topology is the total line style. The main hardware equipments of 10BASE-5 Group network are: Coarse coaxial cable, Ethernet card with AUI socket, repeater, transceiver, transceiver cable, Terminator, etc.
• 10Base-2 use 0.2 inches in diameter and impedance of 50 Ω with fine coaxial cable, also known as fine cable Ethernet, the maximum length of the network segment is 185m, baseband transmission method, the topology is the total line style; The main hardware devices of the 10Base-2 group are: Fine coaxial cable, Ethernet card with BNC socket, Repeater, T-connector, Terminator, etc.