qr code generator using c# You need to document the connection speeds for links because the available bandwidth in Visual C#.NET

Generating QR Code ISO/IEC18004 in Visual C#.NET You need to document the connection speeds for links because the available bandwidth

You need to document the connection speeds for links because the available bandwidth
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on a connection affects the way you configure site links. Each site link is assigned a link cost, which determines its priority order for replication. If there are several possible routes to a site, the route with the lowest link cost is used first. In the event that a primary link fails, a secondary link can be used. Because site design and network infrastructure are so closely linked, you ll want to work closely with your organization s network administrators. If you wear both hats, start mapping the network architecture by listing each network location, the subnets at that location, and the links that connect the location. For an organization with its headquarters in Chicago and four regional offices, in Seattle, New York, Los Angeles (LA), and Miami, this information might come together as shown in Table 35-3. Notice that I started with the hubs and worked my way to the central office. This way, the multiple connections to the central office are all accounted for when I finally make this entry.
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Table 35-3.
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Mapping Network Structure
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10.1.11.0/24, 10.1.12.0/24 10.1.21.0/24, 10.1.22.0/24 10.1.31.0/24, 10.1.32.0/24 10.1.41.0/24, 10.1.42.0/24 10.1.1.0/24, 10.1.2.0/24
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Seattle LA New York Miami Chicago
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256 kilobits per second (Kbps) Seattle Chicago, 128 Kbps Seattle LA
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35
512 Kbps LA Chicago, 128 Kbps LA Seattle 512 Kbps New York Chicago, 128 Kbps New York Miami 256 Kbps Miami Chicago, 128 Kbps Miami New York 256 Kbps Seattle Chicago, 512 Kbps LA Chicago, 512 Kbps New York Chicago, 256 Kbps Miami Chicago
I then used the table to create a diagram similar to the one shown in Figure 35-10, in which I ve depicted each network and the connections between them. I ve also noted the subnets at each location. Although it is also helpful to know the number of users and computers at each 1187
Part 7: Managing Active Directory and Security
Microsoft Windows Server 2003 Inside Out location, this information alone isn t enough to help you determine how links connecting sites are used. The only certain way to know that is to monitor the network traffic going over the various links.
Seattle Network
10.1.11.0/24 10.1.12.0/24 256 Kbps 512 Kbps
New York Network
10.1.31.0/24 10.1.32.0/24
128 Kbps
Chicago Network 256 Kbps 10.1.1.0/24 10.1.2.0/24
128 Kbps
512 Kbps
LA Network
F35ws10
10.1.21.0/24 10.1.22.0/24
Miami Network
10.1.41.0/24 10.1.42.0/24
Figure 35-10. Network diagram for a wide area network (WAN).
Creating a Site Design
Once you ve mapped the network structure, you are ready to create a site design. Creating a site design involves the following steps:
1 2 3 4 5
Mapping the network structure to site structure Designing each individual site Designing the intersite replication topology Considering the impact of site link bridging Planning the placement of servers in sites
35
Each of these steps is examined in the sections that follow.
Mapping the Network Structure to Site Structure
To map the network structure to site structure, start by examining each network location and the speed of the connections between those locations. In general, if you want to make separate network locations part of the same site, the sites should have at least 512 Kbps of available bandwidth. If the sites are in separate geographic locations, I also recommend that the network locations have redundant links for fault tolerance. These recommended speeds are for replication traffic only, not for other user traffic. Smaller organizations with fewer than 100 users at branch locations may be able to scale down to 1188
Part 7: Managing Active Directory and Security
Configuring Active Directory Sites and Replication dedicated 128-Kbps or 256-Kbps links. Larger organizations with 250 or more users at branch locations may need to scale up. Following the previous example, the Chicago-based company would probably be best served by having separate sites at each network location. With this in mind, the site-tonetwork mapping would be as shown in Figure 35-11. By creating the additional sites at the other network locations, you help control replication over the slow links, which can significantly improve the performance of Active Directory. More good news is that sites are relatively low maintenance once you configure them, so you get a significant benefit without a lot of additional administration overhead.
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