tailieunhanh - lecture 08a: Ethernet

Ethernet is a local area network technology that transmits information between computers at speeds of 10 and 100 Mbps. Ethernet is a local area network (LAN) that employs a bus topology (all of the workstations are connected to a single physical medium). It is a broadcast network, which means that all of the workstations on the network receive all transmissions. Ethernet media varieties include the original thick coaxial system, as well as thin coaxial, twisted-pair, and fiber optic systems. . | CSN200 Introduction to Telecommunications, Winter 2000 Lecture-08a Ethernet Ethernet [Ref: Quick Reference Guides to 10/100 Mbps Ethernet, by- Charles Spurgeon] What is Ethernet? Ethernet is a local area network technology that transmits information between computers at speeds of 10 and 100 Mbps. Ethernet is a local area network (LAN) that employs a bus topology (all of the workstations are connected to a single physical medium). It is a broadcast network, which means that all of the workstations on the network receive all transmissions. Ethernet media varieties include the original thick coaxial system, as well as thin coaxial, twisted-pair, and fiber optic systems. What is a network? - More than one computer connected together. The characteristics of a network: 1. How it is setup? • What media they use? - Media • How they are connected? - Topology 2. How it actually works? - Protocol 3. Who controls the network? - Central/No control 4. Where it is used? - Location 5. At what speed it runs? - Speed LAN wiring topology: Star the central node is connected individually to all other nodes, no shared media, central control. ., Mainframe Computer Star Bus shared media, distributed control. ., Ethernet Bus linear network topology, nodes are connected to a single length of cable, shared media, distributed control. ., Ethernet lecture Page 1 (12) CSN200 Introduction to Telecommunications, Winter 2000 Lecture-08a Ethernet Ring a closed-loop network topology, shared media, distributed control, unidirectional. ., Token Ring Mesh has at least two pathways to each node. 1. How Ethernet is setup? • Ethernet Media - Copper cables and Fiber Optic cables • Copper cables: • Coaxial - Thick/Thin • Twisted pair - Shielded/Unshielded • Different Ethernet Standards based on the speed and cable type: • 10BaseT (Unshielded Twisted Pair) • 10Base2 (Thinnet, Thin Ethernet) • 10Base5 (Thicknet, Standard Ethernet) • 10BaseFL (Fiber .