USBs in Device Manager

  • Thread starter Thread starter Richard Fangnail
  • Start date Start date
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Richard Fangnail

What does USB Root Hub mean?

I have four listings in Device Manager for USB ports, and then there
are four USB Root Hub listings.

Do two of them change whenever I turn on the printer or insert a
camera into a USB slot?
 
The USB hardware is configured so that there is a Controller ( Either
a USB-1(1.) or Enhanced USB 2.0 ). The controller hosts the Root
Hubs which is turn actually support the devices plugged into them. The
USB 1(.1) Root hubs normally have 2 ports each and the enhanced
Root Hubs (USB 2.0) have 4 ports ( Sockets ).

"Richard Fangnail" <richardfangnail@excite.com> wrote in message
news:4459deef-e34e-42e7-9a83-bbfe2bbbdac6@t12g2000prg.googlegroups.com...
> What does USB Root Hub mean?
>
> I have four listings in Device Manager for USB ports, and then there
> are four USB Root Hub listings.
>
> Do two of them change whenever I turn on the printer or insert a
> camera into a USB slot?
 
Richard Fangnail wrote:

> What does USB Root Hub mean?
>
> I have four listings in Device Manager for USB ports, and then there
> are four USB Root Hub listings.
>
> Do two of them change whenever I turn on the printer or insert a
> camera into a USB slot?

I don't see 'USB ports' in the Device Manager, unless
something is connected. To see for yourself how things are
connected, resort the Device Manager
Menu : View : 'Devices by connection'

Plug in, turn on, drop out.


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On May 31, 1:55 pm, Richard Fangnail <richardfangn...@excite.com>
wrote:
> What does USB Root Hub mean?
>
> I have four listings in Device Manager for USB ports, and then there
> are four USB Root Hub listings.
>
> Do two of them change whenever I turn on the printer or insert a
> camera into a USB slot?

Every USB controllers have multiple USB ports connected to it. These
are know that the ROOT hubs.
 
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