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 00:21:36 -0700
>
> On May 8, 2022, at 11:09 PM, Tomasz Moń <desowin () gmail com> wrote:
>
> > Note that end nodes cannot directly communicate with each other. The
> > communication is always between host and a device. 
>
> Those two sentences, when combined, imply that either
>
>         1) a host is not an end node
>
> or
>
>         2) a device is not an end node
>
> or both.  Which is the case?
>
> > 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?
>
> And, given that this means that "end node" is not the correct term for a piece of equipment that isn't a hub, what *is* 
> the correct term?
>
> --- End Message ---
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