Witton, David wrote:

> In an unfiltered capture, I am seeing quite a bit of TCP traffic
> (>90%), most of it involving machines other than the one I'm running
> Wireshark on.

Most, or all?  I.e., in an unfiltered capture, are you seeing TCP 
traffic to and from the machine running Wireshark?

> That doesn't seem to match the case described in the FAQ
> below - or am I wrong?

That sounds like a different case.

What OS are you running on the machine doing the capture?  And what type 
of network adapter are you capturing on?

And, if this is on Ethernet, are you using VLANs?  If so, is the TCP 
traffic to and from the host running Wireshark on a VLAN?  (I.e., does 
it have a VLAN header?)
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