First, let me preface by saying my home network is working normally. My 2 computers talk to each other, and both computers can talk to my wireless printer and my wired printer. On my Win 7 machine (Machine0) I just wanted to peek around and see what information the network and sharing center could provide and found some curious results.

Control Panel > Network and Internet > View Network Computers and Devices

In this view, this is all that is reported:

Machine0  MyWorkGroup  MyWifiNet  WSD       127.0.0.1
Machine1  MyWorkGroup  MyWifiNet  NetBIOS
MyRouter               MyWifiNet  SSDP      192.168.0.1

(1) Why does it not report an IP for Machine1?

(2) Why does it only report the loopback IP for Machine0?

(3) Why do neither of my networked printers appear in the list at all?

Control Panel > Network and Internet > Network Map

Windows cannot discover any computer or device.

(4) Why does this view find nothing?

Control Panel > Hardware and Sound > Devices and Printers

This reports (among other things) both printers. I presume it does so because of the installed drivers, though, rather than any network discovery.

Also note that I am able to ping Machine1 and both printers from Machine0.

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Windows is not that clever and two of these three tools are not designed to do what you want them to do. You will only see devices in the Network Map if they all support the proprietary Link Layer Topology Discovery (LLTP) protocol, which I don't think is useful or necessary. The other two views are for non-techies to see what's there. They are probably not for diagnostic purposes. – billc.cn Aug 6 '11 at 3:46
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