Ethernet

Ethernet Ethernet uses a protocol called CSMA/CD. This stands for Carrier Sense, Multiple Access, Collision Detect. The Multiple Access part means that every station is connected to a single copper wire, or a set of wires that are connected together to form a single data path. The Carrier Sense part says that before transmitting data, a station checks the wire to see if any other station is already sending something. If the LAN appears to be idle, then the station can begin to send data. An Ethernet station sends data at a rate of 10 megabits per second. That bit allows 100 nanoseconds per bit. Light and electricity travel about one foot in a nanosecond. Therefore, after the electric signal for the first bit has traveled about 100 feet down the wire, the station has begun to send the second bit. However, an Ethernet cable can run for hundreds of feet. If two stations are located, say, 250 feet apart on the same cable, and both begin transmitting at the same time, then they will be in the middle of the third bit before the signal from each reaches the other station. This explains the need for the Collision Detect ethernet, wire, data, station, lan, collision, cable, address, two, signal, second, phone, each, desktop, bit, stations, send, same, protocol, per, one, messages, message, between, repeater, new, must, hub, however, frame, every, destination, connection, bridge, another