Network device

A network device or Network interface card (NIC) is a device used for networking. However, it is not, as other Linux devices, situated in /dev, it is typically called eth0, eth1 or the like. You can:

ifup eth0 ifdown eth0
 * start and stop your device
 * read from and send to your device using netcat
 * test if a cable is plugged in using ethtool