The Active Directory Namespace in VS .NET

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2 The Active Directory Namespace
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Delegation Record DNS Server triton.com
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DNS Server private.triton.com Figure 2-4: Zone divisions
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Finally, there is one other option to keep your Active Directory implementation separate from the Internet. RFC 1918 defines the use of the .local first-level domain for private networks using DNS. With this implementation, a company would be named, for example, triton.local for the root domain. The .local domain is reserved by the InterNIC for private use, and you can think of it as the same as the 10.0.0.0 IP address range that is reserved for private use. The .local implementation is good for companies who have an Internet presence and who want to keep the Active Directory implementation completely separate. For example, Triton, Inc., can have triton.com for its Internet presence and triton.local for its Active Directory implementation. However, here s the problem: .local names cannot be resolved on the Internet, and you can never have an Internet presence using .local. If you later decide you want to have an Internet integrated implementation, you cannot change the .local first level on your Active Directory root without completely reinstalling the Active Directory. My advice proceed with caution and planning before using this option. It is quite restrictive because it gives you no option to later use your network with the Internet.
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Part I Planning an Active Directory Deployment
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Well, I ve spent quite a bit of time talking about one single planning aspect of the Active Directory your domain root name. As you can see, you have a number of options, and you should carefully weigh them before deciding on an Active Directory root domain name. With that said, here are some final reminders and thoughts: You cannot change your Active Directory root domain without completely reinstalling the Active Directory forest which means reinstalling everything. Proceed with caution and plan your root name wisely. Your domain root name should encompass your entire business, and it should be a friendly, recognizable name. Make sure your name follows DNS Internet standards for Internet integration. Take a hard look at how your company uses the Internet or how it will use the Internet in the future. Find a plan that works best for your company one that balances Internet integration with security needs. And here s the Bible statement for this chapter Simplicity covers a multitude of sins. Keep your name and implementation design as simple as possible. Complex implementations with multiple DNS zones and firewalls, although effective, can cause you many problems. Examine your design and try to anticipate every problem that could possibly occur. Then examine how you would handle those problems.
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This chapter introduced the Active Directory namespace and presented how that namespace is built on the DNS namespace. Active Directory names are DNS names. This feature provides an unlimited level of extensibility and possible integration with the Internet. As you plan your implementation, great care must be taken when designing your Active Directory forest root domain name since all other names in your environment are based on the root name. You should also remember that the root name cannot be changed at a later time without completely reinstalling the forest. Be certain to choose a friendly name that encompasses your entire business environment and to examine how you will integrate your name with the Internet and how you will secure your environment.
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C H A P T E R
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Planning an Active Directory Structure
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In This
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Understanding Active Directory domains Developing a domain structure Understanding Organizational Units Planning Organizational Unit structure
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nce you have determined your Active Directory namespace and you understand the requirements for a DNS implementation, you are ready to begin creating an Active Directory structure in which you design a domain and forest configuration for your network. This chapter explores this process from the ground up, as if you were installing a new Windows 2000 network. However, even if you are upgrading to the Active Directory instead of installing from scratch, you should carefully study this chapter for important planning and implementation issues.
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