|  | 5.4 | Layer 1 Components and Devices
| 5.4.1 | Ethernet 10BASE-T

In this curriculum you will be introduced to three LAN technologies: Ethernet, Token Ring, and FDDI. All three have a wide variety of Layer 1 components and devices. The focus of this chapter will be Ethernet 10BASE-T technologies. When it was developed, Ethernet was designed to fill the middle ground between long distance, low-speed networks, and specialized computer room networks that carried data at high speeds for very limited distances. Ethernet is well-suited to applications in which a local communication medium must carry sporadic, occasionally heavy, traffic at high-peak data rates.

The Ethernet 10BASE-T technologies carry Ethernet frames on inexpensive twisted-pair wiring. You will study four components and three devices that are related to these technologies. The first four components are passive, meaning they require no energy to operate. They are:

- patch panels
- plugs
- cabling
- jacks

The last three are active. They require energy to do their jobs. They are:

- transceivers
- repeaters
- hubs

For more information on other Ethernet, Token Ring, and FDDI components and devices, go to the Web site.

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