Ethernet is a type of network, so in a way it's both. If you're looking at a computer which says it's Ethernet compatible or contains an Ethernet card, it's probably talking about hardware. These days, chances are that if you have a computer that hooks up to a network that isn't wireless, it's using Ethernet to do it.
Ethernet is not a device, it is software protocol. There is hardware to implement the protocol, e.g. NICs, switches, hubs, etc.
A VDU is hardware.
A scanner is both hardware and software, the device itself is hardware (all devices are hardware) but the driver(a program) that runs it is software.
hardware
A microphone is hardware. Software is what programs and games are called.
Motherboards are hardware components, not software.
both a hardware and software
Have to be hardware. How could you write software if there were no hardware to write it on?
Software. Short and sweet. Hardware needs software to work.
Extended User Control.- a protocol to control software at high speed rates from a given hardware. Eg. controlling a Digital Audio Workstation software from a mixing desk. The physical connection is made via Ethernet.
hardware
A System is a collection of software and hardware and how they work together: software, hardware, and interaction among them. Some would modify the above as a collection of "things" and/or persons and the collaboration among them. A PC can be a system, a software component (not necessary a program) can be a system itself, or a cluster of servers, with all the software installed and communicate to each other via HTTP or ethernet with fail over and fault-tolerance...