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MSCA 70-291 Windows Server 2003 Exam Prep

Category - 70-291

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Your domain contains a single DNS server named S1 with the Root hints enabled on S1. Internet access for the company is provided by a NAT server named S2. S2 is connected to the Internet by means of a permanent connection to the company's ISP.

Users report that they can no longer connect to xyz.com, but they can connect to internal resources and to other Internet Web sites. You can successfully access xyz.com from a computer outside the corporate network. What should you do to fix this problem?
  1. On all affected users' computers, run the ipconfig/flushdns command.
  2. Create a root zone on S1.
  3. Disable Routing and Remote Access on S2.
  4. Configure all affected users' computers to use the ISP's DNS server.
Explanation
Answer - A - To ensure that all users are able to access xyz.com, you must run the ipconfig/flushdns command on all affected users' computers.

Key Takeaway: In this case, there may be some negative cache entries in the DNS cache. Hence using the ipconfig/flushdns will flush and reset the contents of the DNS client resolver cache. This can be used to discard negative cache entries from the cache, as well as any other entries that have been added dynamically.
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