How to identify unknown devices on network?

[joe at actionline.com]

>> How can I identify the unknown devices (????? below)
>> on my local network?
>
> Thanks to all who replied. Much of it was over my head, but I especially
> appreciate Ed Knapp's tip to do a google search for a mac address and
> thereby discover what device it that indicates.

oops ... I misspoke (mis-wrote) I guess a google search is not correct.
What mac address search tool did you use, Ed Knapp, to find the device
vendors associated with mac addresses?