Case StudyQuestions

1.	What types of DNS servers are identified in the current infrastructure? UNIX BIND Novell NetWare Windows NT 4 Windows 2000
2.	What DNS namespace should be used internally if Insane Systems wants to have the most secure namespace? insane-systems.com insanesystems.com insanesystems.lcl insanesystems.org
3.	Prior to installing a Windows Server 2003 domain controller, which service or services need to be upgraded? At least one Windows Server 2003 DNS server needs to be installed. At least two Windows Server 2003 DNS servers need to be installed. At least one Windows Server 2003 WINS server needs to be installed. At least one Windows Server 2003 DHCP server needs to be installed.
4.	At which locations should you deploy DNS and WINS servers? DNS and WINS servers at the Home Office to support all sites DNS servers at the Home Office, WINS servers at all offices DNS servers at all offices, WINS servers at the Home Office DNS and WINS servers at all offices
5.	Diagram the WINS server locations and the replication topology.

Answers

1.	C. Each of the DNS servers that are currently in place are running Windows NT 4 as the operating system.
2.	C. When planning the internal namespace, you should consider using a namespace that is different than your Internet presence. Although you could use any of the options, having an internal namespace that is not available from the Internet is the most secure option.
3.	A. For Active Directory to be supported, a DNS server that supports SRV records needs to be installed. A single Windows Server 2003 DNS server will be sufficient when installing Active Directory, but you will want to make sure your design calls for multiple DNS servers in your infrastructure, especially as you install domain controllers at the remote sites.
4.	D. Because each of the offices needs to have the services provided by both name resolution services, you should locate them close to the systems that will access them. If you do locate them at each location, and if the WAN link fails, local resolution can still continue.
5.	To keep the WINS query local, WINS servers should be located at each of the locations. To allow all of the users within the organization to be able to locate resources from all locations, the WINS servers should be configured in a hub-and-spoke topology to reduce the convergence time.