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QUESTION 11
Hotspot Question
You need to allocate bandwidth required for application sharing.
How much bandwidth in kilobits per second (Kbps) should you allocate? To answer, select the appropriate amount of bandwidth for each network connection in the answer area.

Answer:

 

QUESTION 12
You need to create the voice routes.
How many voice routes should you create?

A.    1
B.    2
C.    4
D.    40
E.    270

Answer: C

QUESTION 13
You are implementing the Enterprise Voice solution.
You create the objects described as shown in the following table.

 

You need to recommend which action must be performed to meet the technical requirements for Enterprise Voice routing.
What should you add?

A.    PSTN1 to VP1
B.    PSTN1 to VP2
C.    PSTN2 to VP1
D.    PSTN2 to VP2

Answer: C

QUESTION 14
Remote users report that they fail to access their voice mail by using the Call Voice Mail option in the Skype tor Business client. Remote users can access voice mail by using the subscriber access number. Internal users do not report any issues accessing voice mail.
You need to enable voice mail access without manually dialing the subscriber number.
Which two sets of ports should you open? Each correct answer presents part of the solution.

A.    TCP 443 and UDP 3478 on the external firewall
B.    TCP 5062 and 8057 on the internal firewall. TCP 5062 and 8057 on the external firewall
C.     TCP 443 and UDP 3478 on the internal firewall
D.     UDP 50,000 to 59,999 on the internal firewall
E.     UDP 50,000 to 59,999 on the external firewall

Answer: A

Case Study 3 – Humongous Insurance (QUESTION 15 – QUESTION 19)
Humongous Insurance currently employs 7,500 people and is based in the United States.
The company has 4,000 users in its main office in Chicago. It also has two branch offices, one in New York with 2,000 users and the other in Los Angeles with 1,500 users. The company has 30 executives located across the offices.
The company recently migrated from Lync Server 2010 to Skype for Business Server 2015.
The company plans to increase the use of audio and video (A/V) conferencing to reduce travel costs. Employees have been asked to use A/V, telephony, and instant messaging (IM) conferencing solutions whenever possible for communication with clients and users in the branch offices.
Humongous Insurance is federated with Trey Research Corporation, which uses a third- party IM solution. Users at both companies need to communicate with each other by using their respective IM client.
The company plans to continuously analyze the network to identify:

– potential network delay points
– availability of adequate bandwidth to meet current requirements and anticipated growth

The company plans to continuously analyze the Skype for Business Server 2015 servers for performance metrics.

Planned Changes
Humongous is in discussion to acquire the Southbridge Video company. Southbridge Video has 2,000 users in two sites.
Employees of Humongous Insurance use a variety of mobile devices, including Windows Phones and iOS phones. All iOS phone users must be notified of events, such as new or missed IM invitations and voice mail messages, even when they are using the corporate wireless network.
All public switched telephone network (PSTN) traffic will use the G.711 codec.
All voice will use the RTAudio Wideband codec.
All peer-to peer (P2P) video sessions will support H.264 and RTVideo codecs.
Audio bandwidth between the Los Angeles and New York offices is limited.

Challenges
All users report poor audio and video quality. Calls are dropped or suffer from jitter and lag. These issues exist when users are using the Skype for Business client or Skype for Business Phone Edition.
Humongous Insurance users currently are unable to IM with external clients that use different IM programs.
Currently there is no network oversight for Skype for Business communications. The company has no plans to increase the bandwidth at any sites. Humongous Insurance does not have a defined remote user access policy.

Existing Environment
The three offices are connected to one another as shown in the following network diagram:

 

Additional information about the existing environment is shown in the Supporting Information section:

– Overview of data centers
– Detail of the Chicago data center
– Overview of audio and video codec bandwidths

Employees of Humongous Insurance use various operating systems, including Windows 7 Enterprise, and Windows 8. All users are enabled for Enterprise Voice, and many have Skype for Business Phone Edition.
The concurrent communication modalities usage of the three offices is shown in the following table:

 

Humongous Insurance expects to see the number of video users increase by as much as 10 percent. The company expects to see the number of voice users increase by as much as 15 percent.
All users at Humongous Insurance will be Skype for Business enabled.
The network team configures Quality of Service (QoS) as follows:

 

The Skype for Business Server 2015 media configuration matches the port settings used on the network.
The company uses synthetic transactions to perform call and voice tests.
Many of the employees of Humongous Insurance work from home and sign in securely to the corporate environment in order to use Skype for Business.

Business Requirements
Humongous Insurance would like to review the existing network topology and wants to ensure that network capacity will meet current Skype for Business Server 2015 infrastructure capacity requirements for audio and video usage, as well as meet the anticipated increases.
All existing issues relating to the poor quality of Skype for Business Server 2015 calls and conferencing need to be addressed. Company policy allows for all employees to have the option to use video conferencing. Employees will be limited to VGA video quality. Company executives will not have these limitations.
Quality of Service (QoS) ports must be unique for audio and video traffic.
The company wants to confirm that the current network bandwidth allocated for the network is sufficient for all current and anticipated growth in Skype for Business Server 2015 traffic and would like to guarantee high-quality Skype for Business Server 2015 calls and video conferencing.
Humongous Insurance wants to ensure that the volume of Skype for Business Server 2015 traffic does not exceed 50 percent of WAN bandwidth.
The recommended design solution needs to eliminate the possibility of WAN oversubscription by Skype for Business Server 2015 traffic.
Humongous Insurance wants to use only dedicated computers to monitor the network and perform synthetic transactions to limit the load on the computers.
The proposed Skype for Business Server 2015 solution needs to provide scalability to accommodate the company’s future acquisition of Trey Research.
The proposed Skype for Business Server 2015 solution should be readily available for users in all three sites.

Technical Requirements
The company wants to allow only authorized employees to connect remotely.
All remote users will use a secure method when remotely connecting to the network and the Skype for Business environment.
The number of open and listening ports must be kept to a minimum.
All maintenance and tests of network policies must be done outside of normal business hours. Bandwidth between sites cannot be increased.
The quality of voice and video traffic must be increased.
The number of dropped calls must be reduced.
The corporate information technology (IT) department must be able to push updates and scan users’ computers when they are connected remotely.
All push notifications must be able to be sent mobile clients on all supported cell phone manufactures. Many users do not use Windows mobile phones.
IM users must be able to IM with users who are using other IM programs.
The Skype for Business Server 2015 Bandwidth Calculator must be used to analyze Skype for Business traffic.
It is recommended to deploy QoS for end-to-end support.
Mobile client users are supported only with Lync 2013 Mobile clients.

Supporting Information
Overview of data centers

 

Detail of the Chicago data center

 

Overview of audio and video codec bandwidths

 

QUESTION 15
You need to recommend a solution to test users’ ability to schedule, join, and conduct an audio/video (A/V) conference.
What should you do?

A.    Run the Test-CsAVConference Skype for Business Management Shell cmdlet and then analyze the trace call flow in Snooper.
B.    Run the Test-CsMcxConference Skype for Business Management Shell cmdlet and save the results. View the results by using the Skype for Business Server 2015 Logging Tool.
C.    Run the Test-CsUcwaConference Skype for Business Management Shell cmdlet.
D     Run the Test-CsAudioConferencingProvider Skype for Business Management Shell cmdlet and save the results. View the results by using the Central Logging Service.

Answer: A

QUESTION 16
You need to recommend a solution that will improve voice quality for Skype for Business clients. What should you recommend?

A.    Change the Voice802lp value to 46.
B.    Ensure that VoiceDiffservtag values are set to 46 for all Skype for Business Phone Edition devices at all sites.
C.    Configure an Audio and Video Quality of Service (QoS) to use a DSCP value of 40 and a port range of 57501:65535.
D.    Configure a Domain Group Policy object (GPO) configuring Quality of Service (QoS) and set it to Enforced for all Windows 7 clients.

Answer: B

QUESTION 17
You need to configure the Skype for Business Server 2015 environment to meet the technical requirements for push notifications to mobile users.
Which two actions should you perform? Each correct answer presents part of the solution.

A.    Open port 23457 on the Enterprise Wi-Fi network.
B.     Open port 5223 on the Enterprise Wi-Fi network.
C.     Configure NAME redirection over HTTPS for the acquired domain.
D.     Configure a web publishing rule for port 80 on the reverse proxy for the acquired domain.

Answer: BC

QUESTION 18
You need to allocate the current average amount of bandwidth that is required for peer-to- peer (P2P) voice calls for all three sites.
How much bandwidth in kilobits per second (Kbps) should you allocate?

A.    36,960 Kbps
B.    51,150 Kbps
C.    80,025 Kbps
D.    135,795 Kbps

Answer: B

QUESTION 19
Drag and Drop Question
You need to prepare the Quality of Service (QoS) policy for the Skype for Business environment.
Which values should you use for each configuration? To answer, drag the appropriate value or values to the correct configuration or configurations in the answer area. Each value may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content. Each correct set of answers is worth one point.

 

Answer:

 

Case Study 4 – Trey Research (QUESTION 20 – QUESTION 27)
Trey Research is a global marketing research organization that has a main office in Moscow and branch offices in Los Angeles, London, Berlin, Copenhagen, and Jakarta.

The number of users per office is shown below:
 

Existing systems and telephones
The company has existing IP-PBX systems that are reaching end of life. They use an automatic call distribution (ACD) system for their help desk. This system provides interactive voice response options to users so that they can choose the location for support. This system is also reaching end of life.

The Copenhagen office uses a call group pickup solution that runs on an existing IP-PBX system. All users with the exception of users in Copenhagen have Direct Inward Dialing (DID) numbers.

Trey Research has Skype for Business Enterprise pools in the Moscow, London, and Berlin offices, respectively. They run a Unified Communications Managed API (UCMA) based application in a trusted application pool.

All users in Trey Research are using Aries phones. Users authenticate by using PIN codes.

Quarterly global town hall meetings
Executive conduct global town hall meetings each quarter. Each meeting occurs in a different office. Employees attend the global town hall meetings in meeting rooms which are equipped with full high definition (HD) screens for video. Ten percent of the employees attend the audio portion of the global town hall meetings from their desk.
 

Trey Research plans to implement Skype for Business Enterprise Voice across the company to replace the existing IP-PBX systems.

You must use the following typical bandwidth values to determine the bandwidth requirements in kilobits per second (Kbps) for the solution:

Video resolution bandwidth:
 

Audio codec bandwidth:
 

You have the following requirements:
General
– You must reduce international long distance calling costs, and lower
support and administration costs for the IP-PBX and ACD solutions.
– You must implement voice survivability for all the sites in case of a
wide area network (WAN) link failure.
– Where possible, you must optimize media paths.
– The solution must be resilient to the failure of mediation server
pools.
– The maximum concurrent peer-to-peer connections between Moscow and
Berlin will be 196.
– Response groups must be managed by dedicated response group
administrators.

Gateways
– Existing gateways do not support the REFER method. You must use the
existing gateways with Skype for Business to provide PSTN connectivity.
– In the event of a failure of both gateways at any office, all international calls from that office must route through the Moscow gateways.

Outbound calls
– All calls placed to Russia from any office must route through the
Moscow gateways.
– Germany experiences high public switched telephone network (PSTN) call volume. All calls for Germany must breakout from Berlin in the event of Mediation Server pool failure in Berlin.
– All PSTN calls to Germany must use Berlin gateways in the event of Mediation Server pool failure in Berlin.

You test the Enterprise Voice solution with users in the Copenhagen office. During testing, users reported audio call issues related to the Call Admission Control (CAC) configuration.
The relevant portion of the current configuration is shown in the Table below:

 

You create the following policies:

 

QUESTION 20
Hotspot Question
Two users who recently joined the company’s finance department report that they are not able to use their Aries phones even when they tether the phone to their computer.
You need to design a solution for the Mediation Server pools and trunks that are required to support London, Berlin, and Moscow users.
How many of each component should you deploy? To answer, select the appropriate number of Mediation Server pools and trunks from the lists in the answer area.
 

Answer:

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