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Home > Archive > 70-217 > November 2002 > site replication
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| cm2gj 2002-11-28, 12:02 am |
| Asystems is an international consulting company with offices located throughout the Canada and
Europe. The company's enterprise is a Windows 2000 network that is configured as two domains:
Asystems.com and europe.Asystems.com. Each domain includes multiple sites; one site is configured for each
office. The sites in the Canada are linked by T1 lines. Similarly, the European offices are linked by
reliable, high-speed connections. Unfortunately, the link between the Canada and Europe is not reliable.
What type of link should Asystems establish between the Canada and Europe for Active Directory
replication? (Select the best choice.)
a. an IP site link
b. an SMTP site link
c. an IP site link bridge
d. an SMTP site link bridge
Answer: b
who can provide me a explanation about option D????????? | |
| Riverwind6 2002-11-28, 2:57 am |
| Hey! 
When you establish a site link, you can choose between RPC over IP or SMTP. RPC over IP is the usual preferred way to go but in this situation, since the link is unstable it is better to go with SMTP(because it will be stored and forwarded by mail servers).
A site link bridge is when there is no direct way for a site to speak to another site. In this case they are directly linked together so a site link bridge is not needed.
Remember, unstable or poor links = SMTP. | |
| Deja-vue 2002-11-28, 12:51 pm |
| A site is a collection of one or more subnets that are defined by the administrator. When you define subnets, they should be "well-connected" with high-bandwidth local area network (LAN) connections. Sites can contain multiple domains, and a domain can span more than one site. If a domain spans more than one site, it must replicate by using the Internet Protocol (IP) inter-site transport. You can use the Simple Mail Transfer Protocol (SMTP) inter-site transport only for global catalog replication and replication of non-domain naming contexts, such as the configuration and schema. You define and administer a site in the "Active Directory Sites and Services Manager" snap-in.
The site link allows the administrator to assign the cost and transport for replication. This procedure defines parameters for replication. The cost is an arbitrary value that is selected by the administrator to reflect the speed and reliability of the physical connection between the sites. When you lower the cost value on the link, the priority is increased. Site links
have a replication interval and a schedule that are independent of the cost. The cost is used by the KCC to prefer one site link path over another.
A site-link bridge is a collection of two or more site links that provides a structure to build transitive links between sites and evaluate the least-cost path. For example, you may have three sites, A, B, and C, and you may create the following site links: A---(3)---B---(4)---C. If site B is unavailable (if every domain controller in the site is unavailable), site A cannot replicate to site C because there is no site-A-to-site-C link. To resolve this problem, either create a site link from site A to site C with some cost, or create a site-link bridge that consists of links between site A and site B, and between site B and site C. The bridge infers a transitive link between site A and site C with a cost of 7.
Explanation is from my QOD. | |
| me? I dunno... 2002-11-28, 4:30 pm |
| quote:
When you establish a site link, you can choose between RPC over IP or SMTP. RPC over IP is the usual preferred way to go but in this situation, since the link is unstable it is better to go with SMTP(because it will be stored and forwarded by mail servers).
quote:
If a domain spans more than one site, it must replicate by using the Internet Protocol (IP) inter-site transport. You can use the Simple Mail Transfer Protocol (SMTP) inter-site transport only for global catalog replication and replication of non-domain naming contexts, such as the configuration and schema.
So which one is it? | |
| Riverwind6 2002-11-28, 7:40 pm |
| Its B with the SMTP site link.
The reason is since it is 2 different domains with one in each site, it will not need domain partition replication. So even though SMTP has the limitation of not being able to replicate the domain partition, it will not need to do it. Since the link is a poor connection, SMTP is preferred. | |
| cm2gj 2002-11-28, 10:02 pm |
| thanks to everyone for all this explanations........i know all the stuff about replication costs, sites, sites links, etc etc.. my answer was:
"who can provide me a explanation about option D?" (SMTP site link bridge)
here i become with some confusing........ but is clear now..........
thanks to everyone....... was only a refreshing.... |
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