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Two PC names, Same IP Address, why is this?

We have two workstations, say Terminal A and Terminal B.

The name Terminal B was once used in the past but is now a dead computer name (as far as i know) When i ping Terminal A, which is a current workstation I get the correct IP address. However when i ping the name Terminal B it comes up with the same IP address that Terminal A has.  How can this be?? Terminal B is not listed anywhere in DNS, yet it is resolving to an IP address that already belongs to another station.
1 Solution
Somewhere in your HOSTS file or your DNS listings you have a cross reference of the old system to its old previous IP Address
This might happen if the local PC's ARP cache has not updated itself, check this for more info:
Check your ARP tables, if that is the case using these commands:

Also try pinging Terminal B from couple of other PCs to confirm if it returns duplicate IP from all PCs.

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