Scavenging Stale Records in DNS


DNS Scenario – Scavenging Stale Resource Records

You have a single Active Directory domain. All domain controllers run Windows Server 2008 and are configured as DNS servers. The domain contains one Active Directory-integrated DNS zone.

You need to ensure that outdated DNS records are automatically removed from the DNS zone. What should you do?

  1. From the properties of the zone, modify the TTL of the SOA record.
  2. From the properties of the zone, enable scavenging.
  3. From the command prompt, run ipconfig /flushdns.
  4. From the properties of the zone, disable dynamic updates.

Correct Answer: B

Explanation:

The DNS Server service supports aging and scavenging features. These features are provided as a mechanism for performing cleanup and removal of stale resource records, which can accumulate in zone data over time. You can use this procedure to set the aging and scavenging properties for a specific zone.

Membership in the Administrators group, or equivalent, is the minimum required to complete this procedure.

To set aging and scavenging properties for a zone using the Windows interface

  • Open DNS Manager.
  • In the console tree, right-click the applicable zone, and then click Properties.
  • On the General tab, click Aging.


  • Select the Scavenge stale resource records check box.
  • Modify other aging and scavenging properties as needed.


To know more about Aging and Scavenging read this technet article –

http://technet.microsoft.com/en-us/library/cc771677.aspx

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