Wednesday, September 5, 2012

Windows DNS Server Interview Questions –Part2



Windows DNS Server Interview Questions –Part2

12.How do you manually create SRV records in DNS?
This is on windows server go to run ---> dnsmgmt.msc rightclick on the zone you want to add srv record to and choose "other new record" and choose service location(srv).
13.What is the main purpose of SRV records ?
SRV records are used in locating hosts that provide certain network services.
14. Before installing your first domain controller in the network, you installed a DNS server and created a zone, naming it as you would name your AD domain. However, after the installation of the domain controller, you are unable to locate infrastructure SRV records anywhere in the zone. What is the most likely cause of this failure ?
The zone you created was not configured to allow dynamic updates. The local interface on the DNS server was not configured to allow dynamic updates.
15.Which of the following conditions must be satisfied to configure dynamic DNS updates for legacy clients ?
The zone to be used for dynamic updates must be configured to allow dynamic updates. The DHCP server must support, and be configured to allow, dynamic updates for legacy clients.
16.At some point during the name resolution process, the requesting party received authoritative reply. Which further actions are likely to be taken after this reply ?
After receiving the authoritative reply, the resolution process is effectively over.
17. Name 3 benefits of using AD-integrated zones.
Active Directory integrated DNS enables Active Directory storage and replication of DNS zone databases. Windows 2000 DNS server, the DNS server that is included with Windows 2000 Server, accommodates storing zone data in Active Directory.
When you configure a computer as a DNS server, zones are usually stored as text files on name servers that is, all of the zones required by DNS are stored in a text file on the server computer.
These text files must be synchronized among DNS name servers by using a system that requires a separate replication topology and schedule called a zone transfer However, if you use Active Directory integrated DNS when you configure a domain controller as a DNS name server, zone data is stored as an Active Directory object and is replicated as part of domain replication.
18.Your company uses ten domain controllers, three of which are also used as DNS servers. You have one companywide AD-integrated zone, which contains several thousand resource records. This zone also allows dynamic updates, and it is critical to keep this zone up-to-date. Replication between domain controllers takes up a significant amount of bandwidth. You are looking to cut bandwidth usage for the purpose of replication. What should you do?
Change the replication scope to all DNS servers in the domain.
19.You are administering a network connected to the Internet. Your users complain that everything is slow. Preliminary research of the problem indicates that it takes a considerable amount of time to resolve names of resources on the Internet. What is the most likely reason for this?
DNS servers are not caching replies.. Local client computers are not caching replies… The cache.dns file may have been corrupted on the server.
20.What are the benefits of using Windows 2003 DNS when using AD-integrated zones?
If your DNS topology includes Active Directory, use Active Directory integrated zones. Active Directory integrated zones enable you to store zone data in the Active Directory database.Zone information about any primary DNS server within an Active Directory integrated zone is always replicated.
Because DNS replication is single-master, a primary DNS server in a standard primary DNS zone can be a single point of failure. In an Active Directory integrated zone, a primary DNS server cannot be a single point of failure because Active Directory uses multimaster replication.
Updates that are made to any domain controller are replicated to all domain controllers and the zone information about any primary DNS server within an Active Directory integrated zone is always replicated.
Active Directory integrated zones: Enable you to secure zones by using secure dynamic update.
Provide increased fault tolerance. Every Active Directory integrated zone can be replicated to all domain controllers within the Active Directory domain or forest. All DNS servers running on these domain controllers can act as primary servers for the zone and accept dynamic updates.
Enable replication that propagates changed data only, compresses replicated data, and reduces network traffic. If you have an Active Directory infrastructure, you can only use Active Directory integrated zones on Active Directory domain controllers.If you are using Active Directory integrated zones, you must decide whether or not to store Active Directory integrated zones in the application directory partition.
You can combine Active Directory integrated zones and file-based zones in the same design. For example, if the DNS server that is authoritative for the private root zone is running on an operating system other than Windows Server 2003 or Windows 2000, it cannot act as an Active Directory domain controller. Therefore, you must use file-based zones on that server. However, you can delegate this zone to any domain controller running either Windows Server 2003 or Windows 2000.

0 Responses to “Windows DNS Server Interview Questions –Part2”