What you're typing there looks a lot like a MAC Address which is a hardware address unique to every NIC.
This particular one is licensed to DELL Inc.
3 Com Corporation
Ethernet is not a device, it is software protocol. There is hardware to implement the protocol, e.g. NICs, switches, hubs, etc.
Removes the Ethernet header and trailer
"PCI communications device" is displayed in the Device Manager when Windows does not have a driver for a PCI device that is used for networking in some fashion. It could be a dial-up modem, Ethernet controller, or a wireless card. You will need to download drivers from your computer manufacturer to display a more specific name in the Device Manager and make the yellow question mark go away.
It is a piece of software that is supplied by the device manufacturer.
Ethernet is bi-directional; it both transmits and receives data.
a repeater
A device with wireless connectivity or Ethernet ports, which otherwise connects a series of devices in a network topology.
ethernet controller is the device which deals with lan card means local area connection
removes the Ethernet header and trailer
Integrated Device Manufacturer.
any device in the collision domain whose backoff timer expires first
It depends on the device/gadget you're talking about. It would certainly be possible for a manufacturer to design a device where the GPS would always run even if the device itself was apparently off.