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Microsoft Network Readiness and Assessment for Lync Sample Questions:

1. ======================================
Topic 2, A Datum Corporation
Background
Based in North America
A_. Datum Corporation is a leading financial technology solutions provider. The company provides mortgage lending processing, payment solutions, call centers, and other services for the largest Canadian and US financial institutions.
A_. Datum Corporation has its main office and a data center in Toronto. Call centers are located in Montreal and Quebec. Branch offices are located in other cities across Canada and the United States.
The company plans to consolidate multiple isolated voice communication systems used across the office sites by a single scalable and secured unified communications (UC) solution. The company evaluated several UC vendors and has decided to deploy Microsoft Lync 2013.
A_. Datum Corporation has grown very fast within the last few years. The company has made multiple acquisitions. Each acquired company had its own information technology (IT) policies and support procedures, and some branch offices still operate relatively independently. As a result, the existing network and server infrastructure is very inconsistent.
Existing Environment
A_. Datum Corporation has consolidated all production servers in the data center. Network
switches and routers are mounted in the data center and in secured racks in the offices.
Audio conferencing services for all employees are provided by a dial-in conferencing
provider.
Video conferencing services are available in designated meeting rooms at various offices
and are based on an eight-year-old third-party solution.
All offices, except the call centers, are linked by a Multiprotocol Label Switching (MPLS) network. The call centers are connected with the data center by virtual private network (VPN) links.
Quality of Service (QoS) is not currently implemented, but network specialists have detected that all existing equipment is compatible with possible QoS implementation.
The network topology diagram is shown in the Network Topology Diagram exhibit- (Click the Exhibit button.) The diagram shows bandwidth capacity of primary wide area network (WAN) links. All offices also have backup WAN links with bandwidth capacity of 50 percent of the matching primary WAN link.

Existing average primary WAN links workload is shown in the following table:


Call center statistics show a steady increase in average call duration. Fifteen percent of call center incoming public switched telephone network (PSTN) calls are transferred to employees located in other offices.
Business Requirements
A_. Datum Corporation wants to evaluate the existing network infrastructure to ensure that the infrastructure is capable of meeting the company's expectations of the new UC solution. All existing phones will be replaced with voice over Internet protocol (VoIP) Power over Ethernet (PoE) phones.
Employees who travel between offices or work remotely must be able to use the Lync 2013
client installed on their laptops to make phone calls.
The proposed Lync deployment and possible QoS policies should not increase existing
average network traffic delays for existing applications.
Audio conferencing traffic for employees in the call center sites must be limited.
The call centers must support monthly workload fluctuations from 50 to 200 contract
employees who serve customers' incoming PSTN calls.
Audio communication between the offices must be operational 24 hours a day, seven days
a week. Audio communication must remain available in a case of an external power failure
at any office or at the data center.
The company also plans to improve the quality of call center services by decreasing the
rate of dropped calls due to busy PSTN lines.
The network must be able to automatically switch to backup WAN links without any
degradation of audio call quality.
Technical Requirements
All communications within the UC infrastructure must be secure due to compliance
requirements for processing credit card information.
Wireless networks are restricted in the call centers; however, several other offices have
implemented wireless guest networks.
Lync Edge Servers and Conference Servers will be located in the data center.
Existing analog and digital Private Branch Exchanges (PBXs) will be replaced with Lync
Mediation Servers. The existing video conferencing solution will remain untouched and left
without Lync integration.
The network infrastructure must provide maximum network latency for real-time
communication (RTC) traffic of 150 ms between any two offices.
Available bandwidth for the Lync RTC traffic is limited to 20 percent of the primary WAN
links bandwidth.
Lync Traffic simul-ation
------
The initial Lync traffic simul-ation has been completed for the following locations:
Boston
Detroit
Chicago
Montreal
Quebec
Toronto data center
A_. Datum Corporation wants to design and perform an additional Lync traffic simul-ation for all other offices. The additional simul-ation must also include external users that connect through the Edge Server and simulate phone calls to the Mediation Server. An output of the tracert.exe tool running from a desktop computer in the Quebec call center was captured during the initial Lync traffic simul-ation. The output is shown in the Quebec Traffic simul-ation Output exhibit. (Click the Exhibit button.)

An output of the pathping.exe tool running on a computer located in the Montreal call center was captured during the initial Lync traffic simul-ation. The target computer is located in the data center. The output is shown in the Montreal Traffic simul-ation Output exhibit. (Click the Exhibit button.)

The table below shows peak traffic delays between several offices during the initial Lync traffic simul-ation.

A portion of the initial Lync traffic simul-ation summary is shown in the table below. The table compares estimated (modeled) and simulated real-time communications (RTC) traffic over WAN links.

======================================
HOTSPOT
You need to determine which hop or hops between the Quebec call center and the data center should be further investigated for high raw jitter values.
Which hop or hops should you select from the output of the tracert.exe tool? (To answer, select the appropriate line or lines in the command screen showing output of the tracert.exe tool.)

2. DRAG DROP
You need to configure the Lync Server 2013 Stress and Performance Tool to simulate public switched telephone network (PSTN) traffic.
Which four actions should you perform in sequence? (To answer, move the appropriate four actions from the list of actions to the answer area and arrange them in the correct
order.)

3. You need to configure the Lync 2013 environment to meet the technical requirements for
push notifications for mobile users. Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)

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

4. You need to recommend a network upgrade based on the results of the Lync traffic simulation. Which upgrade should you recommend?

A) Upgrade the backup Multiprotocol Label Switching (MPLS) link at the Toronto data center.
B) Upgrade the backup Internet connection at the Quebec call center.
C) Upgrade the backup Internet connection at the Montreal call center.
D) Upgrade the backup Internet connection at the Toronto data center.

5. You need to perform an additional traffic simul-ation for validating Lync Server implementation in the call centers. What should be the minimum duration of the simulation?

A) one week, business hours only
B) one month, 24 hours a day
C) one month, business hours only
D) one week, 24 hours a day

Solutions: