Planning A Microsoft Windows Server 2003 Network Chapter 08

Planning A Microsoft Windows Server 2003 Network Chapter 08...

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Unformatted text preview: 70-293: MCSE Guide to Planning a Microsoft Windows Server 2003 NetworkChapter 8: Managing andTroubleshooting DNS70-293: MCSE Guide to Planning a Microsoft Win2ObjectivesOptimize DNS performanceSecure DNS replication and Dynamic DNSManage DNS serversManage DNS zonesTroubleshoot DNS issues using various tools70-293: MCSE Guide to Planning a Microsoft Win3Optimizing DNS PerformanceDNS servers can be configured to perform different roles depending on what network design is requiredEach role has an effect on WAN traffic and performance levels in larger networks:Caching-onlyNon-recursiveForwarding-onlyConditional forwarder70-293: MCSE Guide to Planning a Microsoft Win4Delegating AuthorityTo divide the DNS namespace, you must delegate authority for a subdomainWhen authority for a subdomain is delegated, a name server record is created for the subdomainThe name server record points to the server that contains the DNS information for the subdomain 70-293: MCSE Guide to Planning a Microsoft Win5Activity 8-1: Delegating Authority for a SubdomainThe purpose of this activity is to Delegate authority for a subdomain to another DNS server70-293: MCSE Guide to Planning a Microsoft Win6Caching-only DNS ServersA caching-only DNS server does not permanently store any DNS namespace informationCaching-only DNS servers reduce DNS lookup traffic across an Internet connection or on a WANThe major disadvantage of caching-only DNS servers is the potential for caching out-of date information70-293: MCSE Guide to Planning a Microsoft Win7Nonrecursive DNS ServersWhen you do not want client computers to resolve Internet DNS names directly, configuring your DNS server as a nonrecursive DNS server stops themDisabling recursion prevents Internet DNS server being overwhelmed by unauthorized DNS lookup requests from anonymous users on the Internet 70-293: MCSE Guide to Planning a Microsoft Win8Forwarding-only DNS ServersForwarding-only DNS server: Configured to look only at local DNS zones and forwardersNever queries the root servers on the Internet Can be useful if WAN is configured with only a single Internet connection 70-293: MCSE Guide to Planning a Microsoft Win9Activity 8-2: Configuring a Forwarding-only DNS ServerThe purpose of this activity is to configure your DNS server to use forwarders, but not additional recursive lookups using root servers70-293: MCSE Guide to Planning a Microsoft Win10Conditional ForwardersA DNS server that is configured as a conditional forwarder uses a forwarder for requests only if they are for records in certain domainsUseful for reducing WAN trafficWhen the authority for subdomains is delegated andEach location has its own Internet connection 70-293: MCSE Guide to Planning a Microsoft Win11DNS SecurityDNS security is very important in a network using Active Directory because DNS is critical for the proper functioning of Active Directory 70-293: MCSE Guide to Planning a Microsoft Win...
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Planning A Microsoft Windows Server 2003 Network Chapter 08...

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