there is one ethernet connector on the rear of the computer. use this connector to connect the computer to a 10-mbps, 100-mbps, or 1000-mbps network. the following illustration shows an ethernet connector.

connect a category 3, 4, or 5 unshielded twisted-pair (utp) cable to this connector.
the 100base-tx and 1000base-t fast ethernet standards require category 5 or higher cabling.
the ethernet connector has two leds, one that indicates ethernet-link status and one that indicates transmit/receive activity. when the ethernet-link status led is lit, it indicates that there is an active connection on the ethernet port. activity between the computer and the network is indicated by the ethernet transmit/receive activity leds on the front and rear of the computer (see “controls and indicators” on page 9).