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Case Study
This is a case study. Case studies are not timed separately. You can use as much exam time as you would like to complete each case. However, there may be
additional case studies and sections on this exam. You must manage your time to ensure that you are able to complete all questions included on this exam in the
time provided.
To answer the questions included in a case study, you will need to reference information that is provided in the case study. Case studies might contain exhibits and
other resources that provide more information about the scenario that is described in the case study. Each question is independent of the other question on this
case study.
At the end of this case study, a review screen will appear. This screen allows you to review your answers and to make changes before you move to the next

sections of the exam. After you begin a new section, you cannot return to this section.
To start the case study
To display the first question on this case study, click the Next button. Use the buttons in the left pane to explore the content of the case study before you answer the
questions. Clicking these buttons displays information such as business requirements, existing environment, and problem statements. If the case study has an All
Information tab, note that the information displayed is identical to the information displayed on the subsequent tabs. When you are ready to answer a question, click
the Question button to return to the question.
Overview
General Overview
Litware, Inc., is an international manufacturing company that has 4,000 employees. The company has a sales department, a marketing department, a research
department, and a human resources department.
Litware has a partner company named Fabrikam, Inc. Fabrikam has an office in Paris. Fabrikam uses a XMPP-based instant messaging (IM) solution.
Physical Locations
Litware has seven offices located throughout North America and Europe.
Litware has two data centers. The data centers are located in New York and London. All communications for the North American offices are routed through the New
York data center. All communications for the European offices are routed through the London data center.
The number of users in each office is shown in the following table.

Active Directory Environment
Litware has an Active Directory Domain Services (AD DS) forest named litwareinc.com. The forest contains a single domain. All domain controllers run Windows
Server 2008 R2.
Each office contains five domain controllers. Each office is configured as an Active Directory site.
Lync Server Environment
Litware has a Lync Server 2013 infrastructure that contains two servers in the New York office. The servers are configured as shown in the following table.

The SIP domain is litwareinc.com.
Litware has a Microsoft Exchange Server 2013 organization.
Problem Statements
Users in the London office report poor video quality during conferences.
Requirements
Business Goals
Litware wants to minimize the costs associated with purchasing hardware and software.
Planned Changes
Litware plans to migrate the Lync Server 2013 infrastructure to Skype for Business Server 2015. The migration will have a coexistence period of six months.
Litware plans to implement the following components as part of the planned migration:
Persistent Chat
Unified contact store
Enterprise Voice for all users
A central site in each data center
A branch site in each branch office
A Front End pool in each central site
Skype for Business Phone Edition devices
Pool pairing
Litware plans to create a federation relationship with Fabrikam.
Technical Requirements
Litware identifies the following technical requirements for the planned migration:
Users must be able to use all Skype for Business Server features if a single server fails.
Users must be able to connect to the Skype for Business Server infrastructure if a single central site fails.
Members of a group named Temp_Contractors must be prevented from using Skype for Business when they connect remotely.
Only users in the human resources department must be able to access and discover a persistent chat room named HRConfidential.
Security Requirements
Litware plans to deploy remote access. Some users work remotely from their customers’ offices, which have firewall restrictions. All of the remote users must be
able to connect to the Skype for Business Server 2015 infrastructure by using TCP port 443.
You need to plan for the implementation of the DHCP configurations for the Skype for Business Phone Edition devices.
Which threeconfigurations should be applied to the Skype for Business Phone Edition devices from DHCP? Each correct answer presents part of the solution.
(Choose three.)

A. the IP address of a time server

B. the IP address of a Mediation Server

C. the URL of the certificate provisioning service of the Skype for Business Server pool

D. the SIP domain

E. the FQDN of the Lync Server pool registrar

Explanation:
References:
https://technet.microsoft.com/en-us/library/gg398088(v=ocs.14).aspx

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