curious wireshark result

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not sure if this is the correct forum or not but here goes...

This Mdv2008.1 laptop travels between work and home.

When at home, the laptop gets its address via dhcp in the 192.168.1.
range.  A small printserver device in the home network is statically
addressed at

At work, the laptop is statically addressed in the 192.168.0. range.  All
the other 24 machines in this little subnet are statically addressed as

yet, while running wireshark this morning I got this result:

345    497.198435    TCP    hp-pdl-
datastr > 49352 [RST, ACK] Seq=1 Ack=1 Win=65535 Len=0

How can I possibly be getting packets from a device that isn't even
connected to this subnet?

not paranoid...but intrigued

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