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Planning A Microsoft Windows Server 2003 Network Chapter 08

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

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70-293: MCSE Guide to Planning a Microsoft Windows Server 2003 Network Chapter 8: Managing and Troubleshooting DNS
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70-293: MCSE Guide to Planning a Microsoft Win 2 Objectives Optimize DNS performance Secure DNS replication and Dynamic DNS Manage DNS servers Manage DNS zones Troubleshoot DNS issues using various tools
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70-293: MCSE Guide to Planning a Microsoft Win 3 Optimizing DNS Performance DNS servers can be configured to perform different roles depending on what network design is required Each role has an effect on WAN traffic and performance levels in larger networks: Caching-only Non-recursive Forwarding-only Conditional forwarder
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70-293: MCSE Guide to Planning a Microsoft Win 4 Delegating Authority To divide the DNS namespace, you must delegate authority for a subdomain When authority for a subdomain is delegated, a name server record is created for the subdomain The name server record points to the server that contains the DNS information for the subdomain
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70-293: MCSE Guide to Planning a Microsoft Win 5 Activity 8-1: Delegating Authority for a Subdomain The purpose of this activity is to Delegate authority for a subdomain to another DNS server
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70-293: MCSE Guide to Planning a Microsoft Win 6 Caching-only DNS Servers A caching-only DNS server does not permanently store any DNS namespace information Caching-only DNS servers reduce DNS lookup traffic across an Internet connection or on a WAN The major disadvantage of caching-only DNS servers is the potential for caching out-of date information
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70-293: MCSE Guide to Planning a Microsoft Win 7 Nonrecursive DNS Servers When you do not want client computers to resolve Internet DNS names directly, configuring your DNS server as a nonrecursive DNS server stops them Disabling recursion prevents Internet DNS server being overwhelmed by unauthorized DNS lookup requests from anonymous users on the Internet
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70-293: MCSE Guide to Planning a Microsoft Win 8 Forwarding-only DNS Servers Forwarding-only DNS server: Configured to look only at local DNS zones and forwarders Never queries the root servers on the Internet Can be useful if WAN is configured with only a single Internet connection
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70-293: MCSE Guide to Planning a Microsoft Win 9 Activity 8-2: Configuring a Forwarding-only DNS Server The purpose of this activity is to configure your DNS server to use forwarders, but not additional recursive lookups using root servers
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70-293: MCSE Guide to Planning a Microsoft Win 10 Conditional Forwarders A DNS server that is configured as a conditional forwarder uses a forwarder for requests only if they are for records in certain domains Useful for reducing WAN traffic When the authority for subdomains is delegated and Each location has its own Internet connection
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70-293: MCSE Guide to Planning a Microsoft Win 11 DNS Security DNS security is very important in a network using Active Directory because DNS is critical for the proper functioning of Active Directory
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