Exhibit:
You are an Enterprise administrator for contoso.com. The company has a head office and four branch offices. The corporate network of the company consists of a single Active Directory domain. All the servers in the domain run Windows Server 2008 and all client computers run Windows Vista.
Your network is configured as shown in the following diagram. Each office contains a File Server that has a shared folder called SharedData.
You have been assigned the task to ensure the data availability of the SharedData folder in all of the offices when a WAN link fails or a single server fails. You also need to ensure that the users must be able to use existing drive mappings in case of WAN link or a server failure and minimum network traffic over the WAN links.
Which of the following options would you choose to accomplish the desired goal? (Select two. Each correct answer will present a part of the answer)
A.
Stand-alone DFS namespace
B.
Domain-based DFS namespace
C.
Having DFS Replication in a hub and spoke topology
D.
Having DFS Replication in a full mesh topology
Explanation:
To ensure the data availability of the SharedData folder in all of the offices when a WAN link fails or a single server fails, you need to implement a domain-based DFS namespace that uses DFS Replication in a hub and spoke topology
Domain based namespaces require all servers to be members of an Active Directory domain. These types of environments support automatic synchronization of DFS targets. Ina domain environment, a server is capable of hosting multiple DFS roots. It allows you to distribute the user workload across multiple DFS replicas rather than over burdening a single server. In case a single server fails the other servers can take over.
Two pre-defined topologies can be selected for DFS Replication. In this scenario DFS Replication in a hub and spoke topology should be used. In this topology every hub member replicates with the hub member, and if desired you can add a second hub member for fault tolerance (the two hub members replicate with each other).
The hub and spoke topology is have a particular use for enterprises that havelarge headquarters where the company’s permanent IT staff are located and multiple small branch offices with little or no on-site IT staff present.
Full Mesh topology cannot be used because it will cause too much network traffic. This is because every member of the replication group replicates with every other member of the group. The full mesh topology is useful mainly in large LAN environments where all subnets have high speed connectivity and you are using DFS Namespaces together with
DFS Replication to provide fault-tolerant shared file resources to users.
Reference: Planning a DFS Architecture, Part 1/ Planning a DFS Architecture, Part 2 / Domain-Based Namespaces
http://www.petri.co.il/planning-dfs-architecture-part-one.htmReference: Configuring and Using DFS Replication
http://www.windowsnetworking.com/articles_tutorials/Configuring-Using-DFS-Replication.html