Data Acquisition Web

Ethernet is a local area network (LAN) technology, that allows interconnect several devices together, on a flexible network system. The development of this technology evolved over years, becoming ever larger and more complex. Today it is by far the most widely used network technology. The widespread popularity of Ethernet ensures that there is a large market for Ethernet equipment, which also helps keep the technology competitively priced.

Ethernet uses an access method called CSMA/CD (Carrier Sense Multiple Access/Collision Detections), allowing collision detection; each device listens to cable prior to sending data. If the network is clear, the device will transmit, but if some other node is already transmitting, the device will wait until the medium is clear. Sometimes, two devices transmit at the same moment, and a collision occurs. Each device then backs off and waits a random amount of time before attempting to retransmit. It is normal to have collisions, however on Ethernet, the delay is very small and does not normally impairs the speed of transmission on the network.