Feel free to donate to help support PCTechStream.com Thank you so much to all of those who have contributed!

02 - DNS Tutorial Overview.
Creating reverse lookup zones and zone type (standard primary)
Domain Name System (DNS) servers can enable clients to determine the DNS name of a host based on the host's IP address by providing a special zone called a reverse lookup zone. A reverse lookup zone contains pointer (PTR) resource records that map IP addresses to the host name. Some applications, such as secure Web applications, rely on reverse lookups. . Standard primary zone is the only zone type that can be edited or updated because the data in the zone is the original source of the data for all domains in the zone.

Creating the first pointer (PTR) record for the first DNS server
A PTR (Pointer) record is stored in a reverse lookup zone created on a DNS server. PTR records map known TCP/IP addresses to computer names. When a program knows the TCP/IP address of a computer and needs to find the host name of the computer, the program requests a reverse DNS lookup. The DNS server scans the list of PTR records in its reverse lookup zone for a record that maps to the TCP/IP address and returns the host name mapping to that address in the PTR record, to the requesting program.

Testing the first DNS server by running a (simple query)
Windows Server 2008 R2 has built-in functionality for monitoring a DNS server. Monitoring is useful to ensure that DNS resolution is configured properly. You can configure monitoring to occur manually or automatically. In order for the DNS server to do recursion properly, it first needs some helpful contact information about other DNS servers in the DNS domain namespace. if you're actively troubleshooting a DNS problem, you might want to configure testing to occur every 10–15 seconds. This interval will provide a rapid succession of test results. If you're monitoring DNS for problems as part of your daily administrative duties, you'll want a longer time interval, such as two or three hours.


DNS Quiz Questions.

  1. What is the main purpose of a DNS server?

    To resolve IPX addresses into NetBIOS names
    To resolve IP addresses into NetBIOS names
    To resolve IP addresses into FQDN names
    To resolve FQDN names into NetBIOS names


  2. SOA records must be included in every zone. What are they used for?

    SOA records contain a TTL value, used by default in all resource records in the zone.
    All three
    SOA records contain the e-mail address of the person who is responsible for maintaining the zone.
    SOA records contain the current serial number of the zone, which is used in zone transfers.


  3. By default, if the name is not found in the cache or local hosts file, what is the first step the client takes to resolve the FQDN name into an IP address?

    Performs a recursive search through the primary DNS server based on the network interface configuration
    Performs an iterative search through the primary DNS server based on the network interface configuration
    Performs an iterative search through the root servers


  4. You are the administrative team leader in your company. To help promote the product line, you initiated a web site project and assigned your site a simple and intuitive domain from the .biz TLD. You went through local testing of the site and opened it for access from outside your network. However, despite the fact that referring to this server using its IP address works, every time you try to access it using its FQDN, you end up on a site of a different company. In your local testing, this was not a problem. What is the most likely reason external access does not function as expected?

    Check your Internet Explorer settings, or try using Netscape Navigator instead.
    Check that your SLD domain name does not contain "net," "com," or other reserved keywords.
    The .biz TLD domain is invalid on the Internet.
    Prior to assigning your publicly referenced domain name, you needed to run it by an ICANN-accredited domain name registrar to make sure that it is not taken, and to make sure no one registers it later on.


  5. At some point during the name resolution process, the requesting party received an authoritative reply. Which further actions are likely to be taken after this reply?

  01 - Installing and setting up the first DNS server 2008 R2 - Creating forward lookup zones and zone type (standard primary) - Creating the first host (A) record for the first DNS server


  02 - Creating reverse lookup zones and zone type (standard primary) - Creating the first pointer (PTR) record for the first DNS server - Testing the first DNS server by running a (simple query)

02 - DNS Diagram Tutorial


  03 - Installing and setting up the second DNS server 2008 R2 - Connecting to the primary DNS from the DNS manager - Creating forward lookup zones and zone type (standard secondary)


  04 - Creating reverse lookup zones and zone type (standard secondary) - Transferring the DNS records from primary to secondary zones - Verifying the DNS client configuration on Windows 7


  05 - Promoting the secondary DNS to primary DNS server - Changing zone types from (secondary) to (primary) - Promoting the primary DNS to secondary DNS server - Changing zone types from (primary) to (secondary)







Next >