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Question 1:
You need to configure the Lync 2013 Bandwidth Calculator to provide a visual alert when the volume of Lync traffic at Contoso exceeds the maximum allowed threshold. What should you do?
A. For the Contoso office in Vancouver, update the value for WAN link BW allocated for RTC traffic to 5 Mbps.
B. In the global definitions, update the value of the Flag in Red parameter to 50%.
C. For the Contoso office in Seattle, update the value for WAN link BW allocated for RTC traffic to 5 Mbps.
D. In the global definitions, update the value of the Flag in Red parameter to 25%.
Correct Answer: D
/ Volume of Lync traffic does not exceed 25 percent of the WAN bandwidth
Question 2:
You need to run a Lync traffic simul-ation for the Dallas office. What should you do first?
A. Install Power over Ethernet (PoE) phones in the office.
B. Determine whether sufficient bandwidth is available.
C. Failover the office to a backup wide area network (WAN) link.
D. Implement Quality of Service (QoS) policies.
Correct Answer: B
Question 3:
Your customer has a main office that houses 450 employees and a call center that houses 120 employees. The main office and the call center are connected by a 100-megabits per second (Mbps) wide area network (WAN) link. The call center uses a Private Branch Exchange (PBX) that has 150 incoming lines.
Your customer plans to deploy a Lync infrastructure for all employees. You collect network information and start building a Lync usage model. You need to identify the deliverables that must be achieved after the Lync usage modeling phase is completed.
Which two deliverables should you achieve? (Each correct answer presents part of the solution. Choose two.)
A. Quality of Service (QoS) configuration
B. calculation of user-generated Lync traffic
C. calculation of server-to-server generated Lync traffic
D. calls simu-lation over the WAN link
E. RTC traffic estimation over the WAN link
Correct Answer: BE
Modeling traffic is effectively a process of calculating or extrapolating expected data usage of an application based on understanding the data requirements of the application. Usage scenarios can be defined and data calculation can be performed based on the respective scenarios. However, modeling RTC traffic is only as useful as the information provided. There are certainly some published generic guidelines about utilization levels and user profiles, but they are not a replacement for obtaining accurate information on actual PSTN usage, peer calling, and conferencing usage.
An Introduction to Network Assessment Concepts: Microsoft Unified Communications
Question 4:
Your company corporate telephony environment is a combination of Lync 2013 and traditional Private Branch Exchange (PBX). The company has 3,500 users at three sites that use a Multiprotocol Label Switching (MPLS) topology. On average, the company has 3 percent of its users dialing in for conferences and 7 percent on a public switched telephone network (PSTN) call at any time.
The company plans to remove the PBXs and have all users use only Lync 2013. The company also plans to migrate from an existing content sharing platform.
You need to generate a persona by using IP-based unified communication (UC) scenarios.
Which three pieces of information should you collect when you are defining a persona for the existing communications? (Each correct answer presents part of the solution. Choose three.)
A. conference sessions
B. voice codec used
C. PSTN-to-PSTN sessions
D. peer-to-peer (P2P) sessions
E. content sharing
Correct Answer: ADE
User Guide Microsoft Lync Server 2010 and 2013 Bandwidth Calculator
Question 5:
Your company corporate telephony environment is a combination of Lync 2013 and traditional Private Branch Exchange (PBX). The company has three sites that are connected by a Multiprotocol Label Switching (MPLS) topology. There are
750 users who are using Lync 2013 and 2,500 users who are using the PBX environment. On average, the company has 10 percent of its users in conferences.
Multiple users report dropped calls and poor voice quality. The company is planning to add additional bandwidth for all sites.
You plan to generate and collect simulated traffic and then analyze the variations in the baseline network characteristics for each audio call.
You need to collect the baseline network characteristics to simulate peer-to-peer (P2P), conference, and public switched telephone network (PSTN) communications.
Which three pieces of information should you collect? (Each correct answer presents part of the solution. Choose three.)
A. cycle jitter
B. burst packet loss
C. sampling jitter
D. one-way network delay
E. average jitter
F. jitter period
Correct Answer: BDE
Support for all five baseline characteristics:
o One-way network delay
o Average jitter
o Maximum jitter
o Average packet loss
o Burst packet loss (peak consecutive packets lost)
Networking Guide Network Planning, Monitoring, and Troubleshooting with Lync Server
Question 6:
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.)
Hot Area:
Correct Answer:
Question 7:
You analyze the results of Lync traffic modeling for a customer\’s network. The relevant portion of the network topology diagram is shown in the answer area. The estimated links workload is shown in the following table:
The customer wants to build a highly available Lync infrastructure.
You need to determine which link must be updated to support the customer\’s requirements.
Which link should you update? (To answer, select the appropriate link in the network topology diagram.)
Hot Area:
Correct Answer:
Question 8:
You are evaluating Lync traffic modeling results for your customer.
The customer\’s network topology is shown in the Network Topology exhibit. (Click the Exhibit button.)
Bandwidth utilization results for the sites are shown in the exhibits as follows:
Correct Answer:
Speed Sensing Mismatch (Full/Auto)
Network adapter speed and duplex mismatch is another issue that can cause packet loss and jitter on a network segment. It can seem counterintuitive that the Auto setting on a network adapter driver or switch port does not work against another interface set to Full. Both interfaces must be set to the same setting in order for packets to flow reliably. In many cases, network performance degradation caused by mismatched settings go unnoticed until real-time media is carried over this link.
Network Planning, Monitoring, and Troubleshooting with Lync Server
Question 9:
Your customer\’s network includes a main office with 500 employees and 10 branch offices with 200 employees each. All branch offices are connected to the main office by wide area network (WAN) links.
You analyze the network readiness for Lync deployment. The customer estimates that at any given time, 20 employees at each branch office will be involved in audio conferences and 150 will be involved in public switched telephone network
(PSTN) conversations over the WAN
link.
You need to modify the relevant modalities of the correct usage model for the branch offices.
How should you modify the relevant modalities? (To answer, select the appropriate value in each drop-down menu in the table showing information from the Lync Persona tab.)
Hot Area:
Correct Answer:
Question 10:
You need to determine which type of encrypted traffic will be seen across which connections for the pilot project.
Which protocol should you use for each connection? (To answer, drag the appropriate connection type or types to the correct protocol or protocols in the answer area. Each connection type 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.)
Select and Place:
Correct Answer:
Note:
Transport Layer Security (TLS) and Mutual Transport Layer Security (MTLS) protocols provide encrypted communications and endpoint authentication on the Internet. Microsoft Lync Server 2013 uses these two protocols to create the network
of trusted servers and to ensure that all communications over that network are encrypted. All SIP communications between servers occur over MTLS. SIP communications from client to server occur over TLS.
Ref: http://technet.microsoft.com/en-us/library/dn481133.aspx
Question 11:
You are developing a design solution to eliminate the possibility of wide area network (WAN) oversubscription by Lync traffic.
You need to assign tasks to each office.
Which tasks should you assign to each office? (To answer, drag the appropriate task or tasks to the correct office or offices in the answer area. Each task may be used once, more than once, or not at all. You may need to drag the split bar
between panels or scroll to view content.)
Select and Place:
Correct Answer:
Note:
From scenario:
* The core portion of the infrastructure is located in the Vancouver data center, although the Seattle data center also has two servers (AD Domain controller, DFS server) to provide redundancy of Active Directory and data services.
* Contoso plans to redesign the existing site-to-site VPN solution between the Vancouver and Seattle offices to implement a robust and reliable WAN solution with end-to-end support of Quality of Service (QoS).
Question 12:
You need to prepare the Quality of Service (QoS) policy for the audio/video (A/V) Edge Servers in order to meet the technical requirements of Humongous Insurance.
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.)
Select and Place:
Correct Answer:
Ref: http://technet.microsoft.com/en-gb/library/jj205076.aspx
Question 13:
You analyze the results of Lync traffic modeling for a customer\’s network. Information about the network is displayed in the exhibit. (Click the Exhibit button.)
The model is based on all Lync modalities usage and assumes that all Lync servers are consolidated in the datacenter.
Your customer wants to dedicate no more than 30 percent of its Multiprotocol Label Switching (MPLS) links to Lync traffic. The branch office link must accommodate at least 50 simultaneous phone calls.
You need to recommend network changes to meet the customer\’s requirements.
Which change should you recommend for each link? (To answer, drag the appropriate change or changes to the correct link or links in the answer area. Each change 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.)
Select and Place:
Correct Answer:
Question 14:
Your customer\’s network includes a main office in Moscow and branch offices in Helsinki and Stockholm- Both branch offices are connected to the main office by WAN links. You complete a Lync network readiness assessment. The relevant portions of the Lync traffic simul-ation results for each branch office are shown in the following exhibits:
Correct Answer:
Question 15:
You prepare a response to a client\’s request for proposal (RFP) for a Lync network readiness assessment.
The client\’s network includes a main office that houses 500 employees and 30 branch offices that house 20 to 100 employees each. All sites are connected by a Multiprotocol Label Switching (MPLS) network. The client plans to use Lync
video and upload and share Microsoft PowerPoint presentations.
The client wants to perform a Lync network assessment.
You need to include the required tasks in the RFP response, in the correct order.
Which four tasks 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.)
Select and Place:
Correct Answer:
Note:
* In order:
* The network assessment uses a proven methodology to:
/ Discover your environment.
/ Model your usage patterns and usage scenarios by using information collected during discovery, with the help of the Lync Bandwidth Calculator.
/Simulate the anticipated Lync Server traffic volumes by using real media streams for a full seven days.
/ Analyze the underlying network infrastructure performance characteristics to determine your readiness in deploying Lync Server.
After you identify the scenarios to simulate traffic, coupled with the anticipated total bandwidth required, you