Case Study – Contoso, Ltd.
The following testlet will present a Case Study followed by 3 multiple choice questions, 4 create a tree questions, 4 build list and reorder questions and 0 drop and connect questions.
You will have 60 minutes to complete the testlet.
For help on how to answer the questions, click the Instructions button on the question screen.
Contoso, Ltd. is a manufacturing company that has 4,000 employees. The company has a sales department, a marketing department, a research department, and a human resources department.
The company has four offices. The offices are configured as shown in the following table.
The New York office contains the main data center. Communications for all of the offices is routed through the New York office.
All telephone calls from the Los Angeles office and the Miami office are routed through a PSTN gateway in the New York office.
All offices connect to each other by using a WAN link. Each office connects directly to the Internet.
Active Directory Environment:
The company has an Active Directory forest named contoso.com. The forest contains a single domain. All domain controllers run Windows Server 2008 R2. Each office contains two domain controllers. Each office is configured as an Active Directory site.
Each office contains DHCP servers that run on 32-bit servers.
Lync Server Environment:
The company has nine servers. The servers are configured as shown in the following table.
The company uses a SIP domain of contoso.com. The voice infrastructure is configured as shown in the following table.
All users are enabled for Enterprise Voice.
The company also contains two Edge Servers that have Lync Server 2013 deployed. The servers are configured as shown in the following table.
The Miami office has a dial plan. The dial plan is configured as shown in the following table.
The Lync Server configuration has five routes. The routes are configured as shown in the following table.
The PSTN usage for the users in the Los Angeles office is configured as shown in the following table.
The company identifies the following issues with the current infrastructure:
Los Angeles users report that the audio quality during calls to the New York office is poor and that the calls often disconnect.
Users in the Miami office report that when their WAN link fails, they cannot establish calls to the PSTN.
The Miami users report that they cannot call the Los Angeles users by using a five- digit internal phone number.
The company plans to implement the following changes:
Provide voice resiliency in all of the offices if a WAN link fails.
Implement Call Park.
Implement an unassigned number range that has a voice announcement.
Add an additional auto attendant.
Implement a gateway in the Los Angeles office that uses the local PSTN.
Migrate several users to Microsoft Lync Online. The users will use instant messaging (IM) with MSN users only. Client computers will use automatic configuration and open federation. The migrated users will use a SIP domain of cloud.contoso.com.
Provide a backup route for each office if a gateway fails.
Provide each office with access to the local PSTN.
The company identifies the following technical requirements:
Enable five-digit internal dialing that uses the site code and the last four digits of the phone number range.
Configure the New York gateway as the backup route for the local gateway in each office.
Changes to the infrastructure must minimize the number of new servers deployed.
You need to ensure that the Miami users can use a five-digit extension when they call the Los Angeles users. What should you include in the normalization rule?
To answer, configure the appropriate match pattern and translation pattern in the dialog box in the answer area.
You need to configure the unassigned numbers range to support the planned changes. Which four actions should you perform?
To answer, move the four appropriate actions from the list of actions to the answer area and the correct order.
Select and Place:
The Los Angeles users have the following call statistics:
Peak call concurrency is 25 percent
Fifty percent of all placed calls are routed to the PSTN.
Thirty percent of all placed calls are internal calls to users in the other offices.
Twenty percent of all placed calls are conference calls.
The average bandwidth for peer-to-peer calls is 65 kilobits per second (Kbps).
The average bandwidth used for conference calls is 100 Kbps.
You need to identify the minimum amount of bandwidth required on the WAN link for the planned implementation of the media gateway in the Los Angeles office. All calls to the PSTN will be routed through the local media gateway in the Los Angeles office.
A. 10.00 megabits per second (Mbps)
B. 7.20 megabits per second (Mbps)
C. 3.95 megabits per second (Mbps)
D. 2.25 megabits per second (Mbps)
Correct Answer: C
You need to design the Call Park solution. Which Call Park design should you choose?
To answer, select the appropriate range and application server in the dialog box in the answer area.
You need to create the DHCP options required for Lync Phone Edition devices. Which three actions should you perform?
To answer, move the three appropriate actions from the list of actions to the answer area and arrange them in the correct order.
Select and Place:
You need to plan the subnets for Call Admission Control (CAC) and media bypass. Which subnet or subnets should you identify for each office?
To answer, drag the appropriate subnet or subnets to the correct office in the answer area. Each subnet may be used once, more than once, or not at all. Additionally, you may need to drag the split bar between panes or scroll to view content.
Select and Place:
You need to identify which Lync Server 2013 components must be deployed to each office to support the planned changes for voice resiliency. Which components should you identify for each office?
To answer, select the appropriate component for each office in the answer area.
You need to create the new Auto Attendant contact object. Which two tools can achieve the goal? (Each correct answer presents a complete solution. Choose two.)
Correct Answer: AE
You are evaluating the implementation of the gateway in the Los Angeles office. You need to ensure that least cost routing is used in the Los Angeles and Houston offices for local calls after the gateway is deployed. The solution must meet the technical requirements. Which route should you assign to each PSTN usage?
To answer, drag the appropriate route to the correct PSTN usage in the answer area. Each route may be used once, more than once, or not at all. Additionally, you may need to drag the split bar between panes or scroll to view content.
Select and Place:
Your need to recommend which DNS records must be created to support the planned migration to Lync Online. Which DNS records should you recommend creating?
To answer, configure the appropriate record name and target in the dialog box in the answer area.
You need to recommend a client configuration strategy to meet the requirements for the planned migration to Lync Online. What should you recommend?
A. Deploy a Group Policy object (GPO) that adds the msn.com domain to the Internet Explorer settings.
B. Enable public IM connectivity for each user.
C. Create a hosting provider for the msn.com domain,
D. Enable federation for each user.
Correct Answer: B
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