It means that more than one "echo reply" (the name for a response to
a ping) was sent in response to an "echo request". This could happen,
for instance, if you were to ping a subnet broadcast address. It
could also happen if more than one node were assigned the same IP
address, or it could also happen if a node happened to be configured
with an incorrect (longer, more bits in mask) netmask. In the latter
case what you could have is a node configured with a 24-bit mask
on a network that's using, say, a 16-bit mask. The incorrectly
configured node would respond to a ping to address a.b.c.d.255 which
it would consider the broadcast address, but which instead is the
address of some host also responding to the same ping.
-- Farrell
R. Sean Hartnett wrote:
> Occasionally when pinging something I see the phrase at the end of the
> report time of (DUP!). I don't recall seeing this before, can anyone
> tell me what it means?
>
> Thanks
> Sean
>
>
>
>
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