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Troubleshooting Lab

In the following lab, you troubleshoot name resolution on Computer1 and Computer2.

1.
Log on to Computer1 as Administrator.

2.
Open a command prompt and enter the command nbtstat –R.

3.
At the command prompt, enter the command ping computer2.

The ping attempt is successful.

4.
Use the procedure named “To disable WINS/NetBIOS name resolution” in Lesson 1 to disable NetBIOS for the local area connection on Computer1.

5.
Open a command prompt and type the command nbtstat –R.

6.
At the command prompt, enter ping computer2.

The ping attempt is not successful.

7.
At the command prompt, enter ping computer2.domain1.local.

The ping attempt is not successful.

8.
Answer the following question:

Q:Given that the DNS server is configured on Computer1, why are you unable to ping computer2.domain1.local?

_____________________________________________________________________

_____________________________________________________________________

9.
Open a new command prompt by clicking Start, pointing to All Programs, pointing to Windows Support Tools, and clicking Command Prompt. At the Support Tools command prompt, enter dnscmd . /Config .AllZones /AllowUpdate 1.

This command enables dynamic updates on all zones hosted by the local DNS server.

10.
Log on to Computer2 as Administrator.

11.
On Computer2, on the DNS tab in the Advanced TCP/IP Settings dialog box for the local area connection, select the Use This Connection’s DNS Suffix In DNS Registration check box. Click OK twice, and then click Close.

12.
Open a new command prompt on Computer2 and enter ipconfig /registerdns.

13.
Switch back to Computer1, open a new command prompt, and enter ping computer2.

The ping is still unsuccessful. Because the local DNS Client service has cached the negative response from the previous query, you must clear the cache before you see the successful results of the ping.

14.
At the command prompt on Computer1, type ipconfig /flushdns.

15.
At the command prompt on Computer1, type ping computer2.

The ping is successful.

16.
Reenable NetBIOS for the local area connection on Computer1.

17.
Log off Computer1 and Computer2.

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