c# .net print barcode Describe the differences between intrasite and intersite replication. in C#

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2. Describe the differences between intrasite and intersite replication.
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3. Describe the reasons you might want to disable site-link transitivity.
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Lesson Summary
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Intrasite replication is optimized for speed. Domain controllers replicate changes when they occur in uncompressed format. Intersite replication is optimized to preserve bandwidth. Replication occurs through bridgehead servers, the data is compressed, and you can schedule the availability of site links and the interval at which replication occurs. A service named the Knowledge Consistency Checker (KCC) automatically creates and adjusts the topology of replication-connection objects necessary for domain controllers to replicate to one another. A site link is an Active Directory object that represents the physical connectivity between two or more sites. For replication to occur between sites, you must estab lish a link between the sites. All sites contained within the site link are considered to be connected by means of the same network type. All site links are assigned a cost that is used in determining the routing preference they are given relative to other site links. By default, all site links are assigned a cost of 100. By default, site links are transitive. You can disable transitivity, but you must then create site-link bridges to ensure a complete replication path throughout the domain.
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Lesson 4: Designing a Migration Path
If you are designing an Active Directory structure for a network that is already running Microsoft Windows NT 4 or Windows 2000, you are going to have to give some thought to how you are going to implement Windows Server 2003 and your new network design. If you followed the recommendations from 2, you already have a good idea of the existing network infrastructure along with a good set of diagrams. This lesson presents an overview of migration concerns from both Windows NT 4 and Windows 2000 to Windows Server 2003.
After this lesson, you will be able to
Identify important concerns about migrating from Windows NT 4 domains. Identify important concerns about migrating from Windows 2000 domains.
Estimated lesson time: 10 minutes
Migrating from Windows NT 4 Domains
There are many differences between Windows NT 4 and Windows Server 2003. From a domain-design perspective, one of the biggest differences is simply that Windows NT 4 did not use sites. Windows NT 4 domains were used both to form replication bound aries and to form logical security boundaries. This means that the creation of domains on a Windows NT 4 network followed different logic. Often, multiple domains were created to help control replication traffic where a single domain and multiple sites would work in Windows Server 2003. Also, multiple Windows NT 4 domains may have been created to build an administrative structure where a single domain and multiple organizational units would suffice in Windows Server 2003. With these differences in mind, there are two methods you can use to migrate from a Windows NT 4 domain structure to a Windows Server 2003 domain structure: a domain restructuring or an in-place domain upgrade. A domain restructuring offers more long-term benefits than an in-place upgrade. Most multiple-domain Windows NT 4 structures can be restructured into a single (or at least fewer) Windows Server 2003 domain. Also, a well-considered structure of sites and organizational units almost always makes for a more efficient network. An in-place domain upgrade does offer a few shorter-term benefits, though, and may be worth considering. In particular, an in-place domain upgrade is useful in the follow ing circumstances:
The current domain structure translates well to Windows Server 2003. You are limited in the amount of design and deployment time you are given.
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You want to minimize changes to the current administrative structure or flow of information on the network. You want to minimize the effect that users and administrators experience during the migration.
Migrating from Windows 2000 Domains
If you are upgrading from a Windows 2000 domain structure, your job is considerably easier than if you are upgrading from Windows NT 4. Most of the Active Directory implementation you find in Windows Server 2003 was also present in Windows 2000, which means that a designer has already put a good bit of thought into the forest and domain structure, the administrative structure, the placement of sites and domain controllers, and the replication topology. The solution that is both the least expensive and the least design-intensive is to upgrade the domain controllers in place and use the current domain structure. Upgrad ing domains in place also minimizes the impact of the upgrade on users and network availability. You have the choice of upgrading some or all of your domain controllers from Windows 2000, but keep in mind that some functions that are new to Windows Server 2003 will not be available unless all domain controllers in a domain or forest are running Windows Server 2003. This functionality is referred to as the functional level of the forest or domain. For a refresher on functional levels, see 1. To prepare a Windows 2000 forest for upgrade to Windows Server 2003, or for the introduction of a new Windows Server 2003 based domain controller, you must first run the Active Directory Preparation tool (Adprep.exe), which you can find in the \i386 folder on the Windows Server 2003 CD. This tool prepares the forest and domains by extending the schema with new modifications, resetting permissions on built-in containers and objects in the Active Directory, and updating administrative tools.
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