You work as the network administrator at Domain.com. The Domain.com network consists of a single Active Directory domain named Domain.com. Domain.com has its headquarters located in London and branch office located in Paris. All servers on the Domain.com network run Windows Server 2008 and all client computers run Windows Vista. Domain.com currently makes use of a computer named CERTKILLER-SR01 and CERTKILLER-SR02 configured as DNS servers. The configuration of CERTKILLER-SR01 and CERTKILLER-SR02 is shown below:
During the course of the day you receive complaints from network users who have CERTKILLER- SR02 configured as their preferred DNS server are unable to access the Internet. Domain.com wants you to ensure that the network users are able to access the Internet by enabling Internet name resolutions for all client computers.
What should you do?
A.
You should consider having the .(root) zone updated on CERTKILLER-SR02 server.
B.
You should consider having CERTKILLER-SR01 configured to have a .(root) zone.
C.
You should consider having the .(root) zone deleted from the CERTKILLER-SR02 DNS server.
D.
You should consider having the DNS cache on CERTKILLER-SR02 deleted.
E.
You should consider having CERTKILLER-SR01 DNS server reconfigured and connect it to the domain.
Explanation:
In this scenario, you should delete the .( root) zone on CertKiller2 server. The .( root) zone is creating a problem. Windows Server 2008 follows specific steps for host name resolution. The server checks its zone records after querying its cache. After that, the DNS server sends requests to the forwarders and then tries resolution by using root servers. The CertKiller2 server contains a root zone by default. This disables the DNS forwarding option and the DNS cannot act as a forwarder. To enable DNS forwarding, you have to delete the root zone. To delete the root zone you can either use the DNS snap-in or the dnscmd.exe command-line utility. You can use dnscmd / zonedelete parameter and specify the name of the DNS zone that you want to delete.