Re: Speed specific Link-Layer Header Types for USB 2.0

[Guy Harris via tcpdump-workers <tcpdump-workers () lists tcpdump org>]

> --- Begin Message ---
>
>
> From: Guy Harris <gharris () sonic net>
>
> Date: Mon, 9 May 2022 11:42:27 -0700
>
> On May 9, 2022, at 1:33 AM, Tomasz Moń <desowin () gmail com> wrote:
>
> > On Mon, May 9, 2022 at 9:21 AM Guy Harris <gharris () sonic net> wrote:
> > > On May 8, 2022, at 11:09 PM, Tomasz Moń <desowin () gmail com> wrote:
> > >
> > > > Device to device communication is not possible.
> > >
> > > Is the idea that the topology of USB is a tree, with the host at the root, and only the leaf nodes (devices, right?) 
> > > are end nodes?
> >
> > To some degree, yes. Note that the hubs are devices as well.
>
> (So "communication is not possible" in "Device to device communication is not possible." preferably refers not to 
> sending USB link layer messages from device to device, but refers to higher protocol layers; otherwise, you wouldn't be 
> able to plug a disk, network device, keyboard, mouse, etc. into a hub and have it communicate with a host also plugged 
> into the hub.)
>
> --- End Message ---
_______________________________________________
tcpdump-workers mailing list
tcpdump-workers () lists tcpdump org
https://lists.sandelman.ca/mailman/listinfo/tcpdump-workers