I heard back from the vendor regarding the hub/switch question that I
mentioned on list about a month ago.

They sort of pointed me to this:

http://www.webopedia.com/TERM/H/hub.html
hub Last modified: Tuesday, February 18, 2003

A common connection point for devices in a network. Hubs are commonly used
to connect segments of a LAN. A hub contains multiple ports. When a packet
arrives at one port, it is copied to the other ports so that all segments of
the LAN can see all packets.
A passive hub serves simply as a conduit for the data, enabling it to go
from one device (or segment) to another. So-called intelligent hubs include
additional features that enables an administrator to monitor the traffic
passing through the hub and to configure each port in the hub. Intelligent
hubs are also called manageable hubs.

A third type of hub, called a switching hub, actually reads the destination
address of each packet and then forwards the packet to the correct port.



So, gang, if you go looking for a hub to insert into a LAN segment for ntop
monitoring, remember you explicitly want a "passive hub", not a switch and
not a switching hub.  Unfortunately, those puppies are getting hard to find.
I'll also caution you that most 10/100 units have at least two segments (1 @
10 and 1 @ 100) with a switch between them.



-----Burton


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