###BeginCaseStudy###
Topic 4, Northwind Traders
Overview
Northwind Traders is a retail company.
The company has offices in Montreal and San Diego. The office in Montreal has 1,000 client computers. The office in San Diego has 100 computers. The
computers in the San Diego office are often replaced. The offices connect to each other by using a slow WAN link. Each office connects directly to the Internet.
Existing Environment
Active Directory Environment
The network contains an Active Directory forest named northwindtraders.com. The forest contains two domains named northwindtraders.com and
west.northwindtraders.com. All servers run Windows Server 2012 R2.
All client computers run Windows 7.
Each office is configured as an Active Directory site. The site in the Montreal office is named Site1. The site in the San Diego office is named Site2.
The forest contains four domain controllers. The domain controllers are configured as shown in the following table.
DC1, DC2, and DC3 are writable domain controllers. R0DC1 is read-only domain controller (RODC). All DNS zones are Active Directory-integrated. All zones
replicate to all of the domain controllers.
All of the computers in the San Diego office are configured to use RODC1 as their only DNS server.
The northwindtraders.com domain contains a Group Policy object (GPO) named GPO1. GP01 is applied to all of the users in the Montreal office.
All of the user accounts for the Montreal users are in the northwindtraders.com domain. All of the user accounts for the San Diego users are in the
west.northwindtraders.com domain.
Network Environment
Site1 contains the member servers in the northwindtraders.com domain shown in the following table.
Server1 connects to SAN storage that supports Offloaded Data Transfer (ODX). All virtual hard disks (VHDs) are stored on the SAN.
A web application named App1 is installed on Servers.
Server3 has a shared folder that contains sales reports. The sales reports are read frequently by the users in both offices. The reports are generated automatically
once per week by an enterprise resource planning (ERP) system.
A perimeter network in the Montreal office contains two standalone servers. The servers are configured as shown in the following table.
The servers in the perimeter network are accessible from the Internet by using a domain name suffix of public.northwindtraders.com.
Each administrator has a management computer that runs Windows 8.1.
Requirements
Planned Changes
Northwind Traders plans to implement the following changes:
On Server1, create four virtual machines that run Windows Server 2012 R2. The servers will be configured as shown in the following table.
Configure IP routing between Site1 and the network services that Northwind Traders hosts in Windows Azure.
Place a domain controller for the northwindtraders.com domain in Windows Azure.
Upgrade all of the computers in the Montreal office to Windows 8.1.
Purchase a subscription to Microsoft Office 365.
Configure a web application proxy on Server6.
Configure integration between VMM and IPAM.
Apply GPO1 to all of the San Diego users.
Connect Site1 to Windows Azure.
Technical Requirements
Northwind Traders must meet the following technical requirements:
All virtual machines must use ODX.
Users must be able to access App1 from the Internet.
GPO1 must not be applied to computers that run Windows 8.1.
All DNS zones must replicate only to DC1, DC2, and DC3.
All computers must be able to resolve names by using a local DNS server.
If a WAN link fails, users must be able to access all of the sales reports.
The credentials for accessing Windows Azure must be permanently stored.
The on-premises network must be connected to Windows Azure by using Server4.
The administrators must be able to manage Windows Azure by using Windows PowerShell.
The number of servers and services deployed in the San Diego office must be minimized.
Active Directory queries for the objects in the forest must not generate WAN traffic, whenever possible.
Security Requirements
Northwind Traders identifies the following security requirements:
Ensure that all DNS zone data is encrypted when it is replicated.
Minimize the number of permissions assigned to users and administrators, whenever possible. Prevent an Active Directory Domain Services (AD DS) attribute
named SSNumber from replicating to Site2.
Ensure that users can use their northwindtraders.com user account to access the resources hosted in Office 365.
Prevent administrators from being required to re-enter their credentials when they manage Windows Azure from approved management computers.
###EndCaseStudy###
You need to recommend a solution for the sales reports.
What should you include in the recommendation?
A.
BranchCache in distributed cache mode
B.
Offline files
C.
BranchCache in hosted cache mode
D.
Distributed File System (DFS)
Explanation:
* Scenario: Server3 has a shared folder that contains sales reports. The sales reports are read frequently by the users in both offices. The reports are generated
automatically once per week by an enterprise resource planning (ERP) system.
* BranchCache is designed to reduce WAN link utilization and improve application responsiveness for branch office workers who access content from servers in
remote locations. Branch office client computers use a locally maintained cache of data to reduce traffic over a WAN link. The cache can be distributed across client
computers (Distributed Cache mode) or can be housed on a server in the branch (Hosted Cache mode).BranchCache Overview
Correct: A
Scenario: The number of servers and services deployed in the San Diego office must be minimized
https://technet.microsoft.com/en-us/library/dd637832(v=ws.10).aspx
http://windowsitpro.com/networking/q-when-should-i-use-branchcaches-hosted-mode-instead-its-distributed-mode
Basically, “BranchCache in DISTRIBUTED cache mode” is used when we don´t want a server in the same subnet that acts as a “BranchCache in HOSTED cache mode”, in which scenario Windows 7 clients don´t create a local cache because the cache is hosted by this server and all clients have to query it in order to get the desired file.
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1
A is not correct. BranchCache (nor Hosted, nor Distributed) does NOT support WAN outage (failure). We have the requirement “If a WAN link fails, users must be able to access all of the sales reports.”
https://www.itprotoday.com/windows-78/dfs-r-vs-branchcache-branch-offices
We are left with Offline Files or DFS.
If the task would be to configure sales reports availability for San Diego site only (100 computers), then, having in mind condition “The number of servers and services deployed in the San Diego office must be minimized”, I would say Offline Files is the way to go. Additionally, you could use GPO to map the reports folder as a drive and even set it as available offline for San Diego users.
However, we are said “The sales reports are read frequently by the users in both offices”, so from Montreal perspective (1000 computers) the idea of Offline Files is not elegant.
Fingers crossed, I am taking D. Distributed File System (DFS).
1
0
Must be B: Offline Files, since Montreal users would not be affected by WAN outage as Server3 is in their own Site. Moreover, you can configure Offline Files only for west.northwindtraders.com users.
0
2
According to the scenario, the computers in the San Diego office are often replaced, so offline caching will not make the reports available all the time if WAN link goes down.
0
0