A "managed" or "smart" hub might store information about layer2 and still
be a layer 1 device.
To give a specific example: the Synoptics 2813 (later Bay networks, later
Nortel) was a manageable/smart hub, "layer 1 multiport repeater" ( to quote
Howard) with "management functions", not a bridge. However it kept a list
of mac addresses on each port, the number of bytes going into the hub from
each port, and some packet size distribution statistics, all available by
SNMP.
But these were management statistics only. What came in one port, went out
all the other ports, like any other "layer 1 multiport repeater".
Jenny
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