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06 - DNS Tutorial Overview.
Creating a new DNS domain
The Domain Name System (DNS) is a hierarchical distributed naming system for computers, services, or any resource connected to the Internet or a private network. It associates various information with domain names assigned to each of the participating entities. The domain name space consists of a tree of domain names. Each node or leaf in the tree has zero or more resource records, which hold information associated with the domain name.

Moving host and pointer records from parent to child DNS domain
The A record, also known as a host record or a DNS host, is a record in your domain's DNS zone file that makes the connection between your domain and its matching IP address. PTR (pointer) records are the reverse of A records: whereas the latter maps names to addresses, PTR addresses map addresses to names.

Changing the client's default DNS server and IP address
When NSLOOKUP starts, before anything else, it checks the computer's network configuration to determine the IP address of the DNS server that the computer uses. Then it does a reverse DNS lookup on that IP address to determine the name of the DNS server. If reverse DNS for that IP address is not setup correctly, then NSLOOKUP cannot determine the name associated with the IP address

Configuring the client with the new primary DNS suffix
The Primary Suffix is an element of the Domain Name System that identifies your computer on a network. Each computer has an identifying name and number, Domain Name System(DNS), assigned to it. The Primary Suffix is an additional number that a user or network administrator can assign to identify the computer within a smaller network, like in a computer lab or a home. The Primary Suffix is present in your computer's Windows configuration.


DNS Quiz Questions.

  1. Pedro wants to configure a Windows Server 2008 DNS server so that it can answer queries for hosts on his intranet but not on the Internet. He can accomplish this by doing which of the following?

    A. Disabling recursive lookups
    B. Configuring his server as a root server and leaving out root hints for the top-level domains
    C. B and D
    D. Leaving forwarding turned off


  2. Your company has been extraordinarily successful with its e-commerce site. In fact, because your customers have come to expect such a high level of reliability, you want to build several servers that mirror each other; just in case one of them fails, you will still be able to provide excellent service for your customers. The name of the web server is www.example.com, which you are duplicating on machines on different subnets, and you have made all the necessary host records in the DNS. After a while, you notice that only one machine is responding to client requests. You are not the original administrator for the company, so you suspect some of the default settings were changed before you arrived. What must you do so that your customers can utilize all the mirrored web servers?

    Enable DNS sharing.
    Enable round robin.
    Enable IIS sharing.
    Configure the proper priorities metric for this hostname.


  3. You are the network administrator for a Windows Server 2008 network. You have multiple remote locations connected to your main office by slow satellite links. You want to install DNS into these offices so that clients can locate authoritative DNS servers in the main location. What type of DNS servers should be installed in the remote locations?

    Stub zones
    Primary and Secondary DNS zones
    Active Directory Integrated zones


  4. The organization you work for has five Windows Server 2008 servers all running as domain controllers. Your DNS servers are all currently running as primary DNS zones. You need to set up a DNS strategy that allows all DNS servers to hold the same database and your company requires that you use secure DNS dynamic updates for all clients. What type of DNS strategy do you need to implement?

    Upgrade 1 server as a primary master and the rest as stub zones.
    Upgrade 1 server as a primary master and the rest as secondary servers.
    Keep all servers primary servers and set up replication.
    Upgrade all servers to Active Directory Integrated servers.


  5. You want to quickly verify that your DNS service is running and listening to queries. What would you click or look at in the dialog box properties in order to do this?

  06 - Creating a new DNS domain - Moving host and pointer records from parent to child DNS domain - Changing the client's default DNS server and IP address - Configuring the client with the new primary DNS suffix

06 - DNS Diagram Tutorial


  07 - Setting up the third DNS server computer - Creating a new delegated domain name - Connecting to the 3rd new DNS server from the DNS manager - Adding the third DNS server to the DNS servers list


  08 - Testing the new DNS configuration settings in a Windows 7 client computer - Troubleshooting the Nslookup "unknown" response for the default DNS server name - Creating the first DNS forwarder


  09 - Configuring the new fourth Caching-only DNS server - Diagram/Explanation to illustrate Caching-only DNS - Connecting to the DNS-CACHE server from the DNS manager - Setting up new IP addresses in the forwarders tab


  10 - Configuring two public DNS and Web server to host a new Website - Diagram/Explanation to illustrate Web Hosting - Creating forward lookup zones for a new master DNS database server







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