I have a Jetway K8M8MSR2 motherboard. It has 6 total USB ports on the
rear, none on front. 4 ports are on-board, whilst 2 ports are on a
separate mounting connected to a motherboard header. The computer is
connected to a IOGEAR GCMP1764 4-computer KVM. It has a keyboard,
mouse and a EPSON R300 printer connected to its USB's.


This is what Device Manager displays:

UNIVERSAL SERIAL BUS CONTROLLERS
GENERIC USB HUB
USB COMPOSITE DEVICE
USB COMPOSITE DEVICE
USB MASS STORAGE DEVICE
USB PRINTING SUPPORT
USB ROOT HUB
USB ROOT HUB
USB ROOT HUB
USB ROOT HUB
USB ROOT HUB
VIA REV 5 OR LATER USB UNIVERSAL HOST CONTROLLER
VIA REV 5 OR LATER USB UNIVERSAL HOST CONTROLLER
VIA REV 5 OR LATER USB UNIVERSAL HOST CONTROLLER
VIA REV 5 OR LATER USB UNIVERSAL HOST CONTROLLER
VIA USB 2.0 ENHANCED HOST CONTROLLER

I understand which entry signifies that I have USB2, although I do not
know if all USB ports are USB2. I fail to comprehend how I have five
'USB ROOT HUB' entries - I think I should have six.

Interestingly, when I turned off the Epson R300 printer, these entries
disappeared:
USB COMPOSITE DEVICE
USB MASS STORAGE DEVICE
USB PRINTING SUPPORT

How is it that a printer is 'mass storage'?
What is the other 'USB COMPOSITE DEVICE'?
What is the 'GENERIC USB HUB'?
Are the four 'VIA REV 5 OR LATER USB UNIVERSAL HOST CONTROLLER'
entries for the four on-board USB's? Why them and not the other two?

Thank you

George