Home Network (Naming) Question

Hopefully this is an easy question for someone. (I'm not that network savvy)
In my router software setup (Belkin 7230) when I do a DHCP Client List trying to see my computers on the network the computer name for one of the computers is listed as (null). There is the IP address and the MAC address, but no host name for this one mac (iBook G4).
What do I need to do? Where does it get this name from? Where do I fill this out?
Any help would be appreciated!
Tom

On the specific computer, open System Preferences, go to Sharing, and fill in a name for the computer in the Name field at the top. You may find that this fixes the issue.
Matt

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