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Your company has a main office and a branch office. The offices connect by using WAN links. The network consists of a single Active Directory domain.
An Active Directory site exists for each office. Servers in both offices run Windows Server 2008 R2 Enterprise. You plan to deploy a failover cluster solution to service users in both offices.
You need to plan a failover cluster to meet the following requirements:
. Maintain the availability of services if a single server fails.
. Minimize the number of servers required.
What should you include in your plan?
A. Deploy a failover cluster that contains one node in each office.
B. Deploy a failover cluster that contains two nodes in each office.
C. In the main office, deploy a failover cluster that contains one node. In the branch office, deploy a failover cluster that contains one node.
D. In the main office, deploy a failover cluster that contains two nodes. In the branch office, deploy a failover cluster that contains two nodes.
Correct Answer: A
Explanation/Reference:
MULTI-SITE FAILOVER CLUSTERING
There are several requirements and recommendations for a multi-site cluster. For Number of Nodes and Quorum Configuration, an even number of nodes with Node and File Share Majority option is recommended. The file share witness is suggested to be located at a third site, that is, a different location from the main site and secondary site, so that it is not lost if one of the other two sites has problems.
It is also possible to design a multi-site cluster that has an odd number of nodes (except as previously noted for Exchange Server 2007), with the majority of nodes at the main site. This design should use the Node Majority quorum configuration (as should all configurations with an odd number of nodes). Note that with this design, complete failure of the main site requires you to intervene and force the cluster to start at the secondary site, because the secondary site has only a minority of nodes. Forcing the cluster to start in this way is called forcing quorum.
http://technet.microsoft.com/en-us/library/dd197575(v=ws.10).aspx
