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Product Description:
Exam Number/Code: 70-337
Exam name: Enterprise Voice & Online Services with Microsoft Lync Server 2013
n questions with full explanations
Certification: Microsoft Certification

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Question No. 17

You need to recommend a solution to prevent calls to the Boston office from being routed over the PSTN. The solution must meet the Lync Server requirements. 

What should you include in the recommendation? 

A. A Lync Server 2013 Director pool 

B. Two Lync Server 2013 trunks 

C. Two Lync Server 2013 Edge Servers 

D. A Lync Server 2010 A/V Conferencing pool 

Answer: B


Question No. 18

Your company has a Microsoft Office 365 subscription. The company uses Microsoft Lync Online. 

You need to ensure that Lync Online users can use dial-in conferencing. The solution must minimize costs. 

What should you do? 

A. Deploy an Edge Server and add a hosting provider to the server. 

B. Deploy an Edge Server and configure the A/V Edge service on the server. 

C. Deploy an A/V Conferencing pool. 

D. Set up an account with a third-party audio conferencing provider. 

Answer: D


Question No. 19

DRAG DROP 

You need to implement a solution to meet the phone number requirements. 

Which four actions should you perform? 

To answer, move the four appropriate actions from the list of actions to the answer area and arrange them in the correct order. 


Answer: 


Explanation:

Box 1:


Box 2:


Box 3:


Box 4:


Note:

*Announcement Deployment Process Configure Announcement settings

*To create a new announcement, you need to perform the following steps:


Question No. 20

You are evaluating whether the PSTN gateways must be upgraded to support the planned migration to Lync Server 2013. 

You need to identify the minimum number of ports required for each PSTN gateway in the New York office. How many ports should you identify? 

A. 10 

B. 20 

C. 100 

D. 200 

Answer: C


Question No. 21

DRAG DROP 

You need to configure UM to meet the UM requirements. 

Which UM component should you use to meet each requirement? 

To answer, drag the appropriate components to the correct requirements in the answer area. Each setting may be used once, more than once, or not at all. Additionally, you can split bar between panes or scroll to view content. 


Answer: 


Explanation:

Box 1: a UM mailbox setting

Box 2: a dial plan

Box 3: a UM mailbox setting

Note:

*You can enable or disable the Play on Phone feature for users associated with the Unified Messaging (UM) mailbox policy. This option is enabled by default and allows users to play their voice mail messages over a phone. The phone can be any phone, including an office or a mobile phone.

*A Unified Messaging (UM) dial plan is created using an organization-wide scope and contains configuration information related to your telephony network. A UM dial plan establishes a link from the telephone extension number of a Microsoft Exchange Server 2010 recipient in Active Directory to a UM-enabled mailbox.

*Manage Voice Mail Settings for a User You can view or set the Unified Messaging (UM) and voice mail features and configuration settings for a user that’s been enabled for UM and voice mail. For example, you can do the following:

*You can create a Unified Messaging (UM) mailbox policy to apply a common set of UM policy settings, such as PIN policy settings or dialing restrictions, to a collection of UM-enabled mailboxes. UM mailbox policies link a UM-enabled user with a UM dial plan and apply a common set of policies or security settings to a collection of UM-enabled mailboxes. UM mailbox policies are useful for applying and standardizing UM configuration settings for UM-enabled users.

*Incorrect: After you create a Unified Messaging (UM) auto attendant, incoming calls to an external telephone number that a human operator would ordinarily answer are answered by the auto attendant.


Topic 2, Wingtip Toys

Overview

Wingtip Toys is a toy manufacturer and distributor in North America. The company has a main office and two branch offices. The main office is located in New York. The branch offices are located in Boston and Chicago.

The number of users in each office is shown in the following table.


Existing Environment

Network Infrastructure

The network contains an Active Directory forest named wingtiptoys.com.

The New York and Boston offices connect to each other by using a 100-megabit per second (Mbps) WAN link. The New York and Chicago offices connect to each other by using a 40-Mbps WAN link.

Exchange Server Infrastructure

The company has a Microsoft Exchange Server 2010 Service Pack 2 (SP2) organization. All of the users in the New York and Chicago offices have Exchange Server mailboxes. The users in the Boston offices do not have mailboxes.

The Exchange Server organization contains two servers. The servers are configured as shown in the following table.


Lync Server 2010 Environment

The company has a Lync Server 2010 infrastructure that contains four components. The components are configured as shown in the following table.


All of the New York and Chicago users use Lync services. The Boston users only use IP-PBX phones.

Only the New York users are configured for on-premises Exchange Server Unified Messaging (UM).

Voice Infrastructure

The hardware components of the current voice infrastructure are configured as shown in the following table.


At any given time, a maximum of 25 percent of the users in the New York office are on the phone. A maximum of twenty percent of the calls are to the PSTN.

Lync Online

The company is evaluating Microsoft Lync Online.

The company moves 20 Chicago users to a Lync Online subscription. The subscription is configured to use a SIP domain of tailspintoys.com.

You did not implement directory synchronization or federation.

User Issues

Currently, all of the calls between the New York and Boston offices are routed through the PSTN.

User Issues

Currently, all of the calls between the New York and Boston offices are routed through the PSTN.

The audio and video quality during web conferences between the Lync users in the Chicago and New York offices often is poor.

Inbound and outbound PSTN calls from the New York office are not redundant. If a PSTN gateway fails, calls are not rerouted to another PSTN gateway.

Requirements

Planned Changes

The company plans to implement the following changes:

-Upgrade the Lync Server 2010 infrastructure to Lync Server 2013.

-Pilot Lync Online for 100 users in the Chicago office.

-Ensure that Lync Online users can find on-premises Lync users in the Lync Address Book.

-Ensure that Lync on-premises users and Lync Online users can communicate with each other by using instant messaging (IM).

Lync Server Requirements

The company identifies the following Lync Server requirements:

-Ensure that the New York users and the Boston users who have IP-PBX phones can call each other without using the PSTN. -Improve the audio and video quality during the web conferences between the Chicago users and the New York users.

Unified Messaging Requirements

The company identifies the following Unified Messaging requirements:

-Pilot integrated voice mail in Microsoft Exchange Online for 100 New York users.

-Configure all users to have a five-digit extension.

-Ensure that users can retrieve their voice mail remotely by dialing +1 516 555 1212.

-Ensure that callers can reach the company directory by dialing +1 516 555 1213.

-Prevent users from receiving an email message when they miss a call.

Business Requirements

Three company executives require a second phone number for their existing Lync account. This second phone number must not appear in any Lync address books or contact lists generated from Active Directory.

Any planned changes must minimize administrative and financial costs.

Network Requirements

You identify the following network requirements for the planned deployment of Lync Server 2013:

-Limit the total bandwidth of all audio and video sessions from the Chicago office.

-Reduce the network utilization of Mediation servers.

-Prioritize Lync audio traffic on the network.

Enterprise Voice Requirements

Voice call routing in the New York office must be redundant. All outbound or inbound PSTN call routes must not depend on a single component.


Question No. 22

HOTSPOT 

You are designing the Lync Server 2013 infrastructure. 

You need to identify the minimum number of Lync Server 2013 Mediation Servers, Lync Server 2013 trunks, and PSTN gateways that must be added to the New York office. The solution must meet the Enterprise Voice requirements. 

What should you identify? 

To answer, configure the appropriate number for each component in the answer area. 



Answer:


Explanation:


Note: 

From Scenario: 

* Ensure that the New York users and the Boston users who have IP-PBX phones can call each other without using the PSTN. 


Question No. 23

You need to recommend a solution to meet the security requirement. 

What should you include in the recommendation? 

A. An outbound translation rule 

B. A response group 

C. A voice policy 

D. A private phone line 

Answer: A


Question No. 24

DRAG DROP 

You need to configure the Lync Server 2013 infrastructure to meet the technical requirements for simultaneous ring. 

What should you include in the Windows PowerShell command? (To answer, select the appropriate PowerShell cmdlet and parameter in the answer area.) 


Answer:



Question No. 25

HOTSPOT 

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. 



Answer: 


Note:

*the Edge generally only listens on port 5061 if you have Federation enabled

*Port, protocol and firewall requirements for federation with Microsoft Lync Server 2013, Lync Server 2010 and Office Communications Server are similar to those for the deployed Edge Server. Clients initiate communication with the Access Edge service over TLS/SIP/TCP 443. Federated partners however, will initiate communications to the Access Edge service over MTLS/SIP/TCP 5061.

Reference: Port Summary - Lync Server and Office Communications Server Federation


Question No. 26

DRAG DROP 

Your company has two main offices. The office are configured as shown in the exhibit. (Click the Exhibit button.) 


You need to recommend which Lync Server 2013 roles must be deployed to meet the following requirements: 

-Remote users must have access to the Lync Server infrastructure. 

-Users must be able to place calls to the PSTN if a trunk fails. 

-Federation with a business partner must be enabled. 

-The amount of WAN traffic must be minimized. 

Which roles should you recommend? 

To answer, drag the appropriate roles to the correct offices in the answer area. Each role 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. 


Answer: 


Explanation:

Box 1: Front End Server 

Box 2: Edge Server 

Box 3: Mediation server

For PSTN.

Box 4: Front End Server

Box 5: Edge Server Box 6: Director Server Note:

*In Lync Server Enterprise Edition, the Front End Server is the core server role, and runs many basic Lync Server functions. The Front End Server, along with the Back End Servers, are the only server roles required to be in any Lync Server Enterprise Edition deployment.

A Front End pool is a set of Front End Servers, configured identically, that work together to provide services for a common group of users.

*Edge Server or Edge pool in your perimeter network, if you want your deployment to support federated partners, public IM connectivity, an extensible messaging and presence protocol (XMPP) gateway, remote user access, participation of anonymous users in meetings, or Exchange Unified Messaging (UM).

*Mediation Server is a necessary component for implementing Enterprise Voice and dial-in conferencing. Mediation Server translates signaling, and, in some configurations, media between your internal Lync Server infrastructure and a public switched telephone network (PSTN) gateway, IP-PBX, or a Session Initiation Protocol (SIP) trunk. You can run Mediation Server collocated on the same server as Front End Server, or separated into a stand-alone Mediation Server pool.

*Directors can authenticate Lync Server user requests, but they do not home user accounts or provide presence or conferencing services. Directors are most useful to enhance security in deployments that enable external user access. The Director can authenticate requests before sending them on to internal servers. In the case of a denial-of-service attack, the attack ends with the Director and does not reach the Front End servers.

*We recommend that you deploy a Director or Director pool in each central site that supports external user access and in each central site in which you deploy one or more Front End pools.

*We recommend that you deploy a Director or Director pool in each central site that supports external user access and in each central site in which you deploy one or more Front End pools.

*To enable support for XMPP federation, the Edge Federation must be enabled.

Reference: Lync Server 2013, Server Roles


Question No. 27

HOTSPOT 

Your company has two offices. One office is located in New York. The other office is located in Seattle. The offices contain five subnets. The subnets are configured as shown in the following table. 


You have a Lync Server 2013 infrastructure. All client computers have Microsoft Lync 2013 deployed. You plan to deploy Call Admission Control (CAC). 

You need to identify which network topology must be deployed for the planned deployment. The solution must ensure that different bandwidth policies can be applied to each floor of each office. 

What is the minimum number of required regions, sites, and subnets? 

To answer, select the appropriate number of regions, sites, and subnets in the answer area. 



Answer:



Question No. 28

HOTSPOT 

Your company has a main office and a branch office. 

The offices connect to each other by using a WAN link. The WAN link has limited bandwidth and experiences packet loss. 

The branch office contains several users only. 

You have a Lync Server 2013 infrastructure. 

You identify the bandwidth requirements for the codecs as shown in the following table. 


Some users in the branch office report that they experience very slow access to shared folders in the main office. 

Some users in the branch office report that they experience very slow access to shared folders in the main office. 

You need to create a bandwidth policy that meets the following requirements: 

-Uses the least amount of bandwidth for audio calls. 

-Minimizes the impact of packet loss on audio call quality. 

-Supports up to 10 concurrent audio calls from the branch office users to the users in the main office. 

How should you configure the bandwidth policy? (To answer, select the appropriate audio limit and audio session limit in the answer area.) 


Answer: 



Question No. 29

DRAG DROP 

You need to identify which configurations must be implemented for the planned Lync Server 2013 deployment. The solution must meet the network requirements. 

Which features should you use? 

To answer, drag the appropriate features to the correct requirements in the answer area. Each feature 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. 


Answer: 


Explanation:


Differentiated services Note:

*Real-time communications are sensitive to the latency and packet loss that can occur on congested networks. Call admission control (CAC) determines, based on available network bandwidth, whether to allow real-time communications sessions such as voice or video calls to be established.

*Media bypass is a Lync Server capability that enables an administrator to configure call routing to flow directly between the user endpoint and the public switched telephone network (PSTN) gateway without traversing the Mediation Server. Media bypass improves call quality by reducing latency, unnecessary translation, possibility of packet loss, and the number of potential points of failure. Where a remote site without a Mediation Server is connected to a central site by one or more WAN links with constrained bandwidth, media bypass lowers the bandwidth requirement by enabling media from a client at a remote site to flow directly to its local gateway without first having to flow across the WAN link to a Mediation Server at the central site and back.This reduction in media processing also complements the Mediation Server’s ability to control multiple gateways.

*Differentiated Services code points (DSCPs) mark IP packets with the type of traffic that is contained in each packet. This information is used by QoS to determine the priority of the packet relative to other network traffic. If QoS is enabled on your network, you can take advantage of it by enabling DSCP marking on servers running Microsoft Lync Server and on Lync clients. Because Lync Server and Lync clients require that different media use different port ranges, the Windows or Windows Server operating system can identify the traffic type and apply the appropriate DSCP to each packet according to the port that it uses.


Topic 3, Contoso, Ltd Case A 

Overview General 

Overview

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.

Physical Locations

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.

Existing Environment 

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.


Problem Statements

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.

Requirements

Planned Changes

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.

Technical Requirements

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.

Business Requirements

Changes to the infrastructure must minimize the number of new servers deployed.


Question No. 30

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) 

Answer: C


Question No. 31

You need to configure DHCP to support the technical requirement for the Lync Phone Edition devices. 

Which DHCP options should you include in the solution? (Each correct answer presents part of the solution. Choose all that apply.) 

A. 40 

B. 43 

C. 80 

D. 120 

E. 144 

Answer: BD

Explanation:

B: DHCP Option 43 

Option 43 is not really a single option but a number of sub-options which tell the phone where to locate the Certificate Provisioning service on the Lync server. 

D: DHCP Option 120 

Once the certificate is downloaded to the phone then a valid Lync registrar server needs to be  located. The value of Option 120 will be the FQDN of the Lync server which will handle  authentication requests from the phones. 

* From scenario: 

Microsoft Lync Phone Edition devices must be supported. 

Reference: Configuring Lync Server for Phone Edition Devices 


Question No. 32

DRAG DROP 

Contoso, Ltd., has five offices. The offices are configured as shown in the exhibit. (Click the Exhibit button.) 


Each office has a local connection to the PSTN. 

The peak usage statistics are shown in the following table. 


Every audio call consumes 100 kilobits per second (Kbps). 

You plan to replace the PSTN connection with a centralized SIP trunkmg service. The service will contain a SIP trunk in the Seattle office and a SIP trunk in the Amsterdam office. The solution will use least cost routing. 

You need to identify the maximum amount of bandwidth that will be used by each SIP trunk. 

What should you identify? 


Answer: 


Explanation:

Box 1: 9,500 Kbps

Box 2: 9,500 Kbps

Note: Transatlantic calls:

*Amsterdam: 10

*Berlin: 0

*Paris: 10

*Seattle: 20

*Los Angeles: 5

Total number of transatlantic calls: 45

Total bandwidth needed: 5760 Kbps (45 x 128 kbps)

*Amsterdam: Amsterdam+ Berlin+ Paris calls to north America: 50 calls x 20% (calls to N.A) x 128 kbps + + (berlin)+ 20 x50 x 128kbps equals 1280 Kbps + 1280 Kbps equals 2560 Kbps

*Seattle: 100 calls x 20% (calls to Europe) x 128 kbps equals 2560 Kbps


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