Vendor: Microsoft
Exam Code: 74-335
Exam Name: Lync Network Readiness Assessment
Version: 14.79
QUESTION 51
Drag and Drop Question
You need to collect troubleshooting information to analyze the Enterprise Voice functionality issues at the Seattle office during the Proof of Concept (POC) testing.
Which five steps should you perform in sequence?
(To answer, move the appropriate five actions from the list of actions to the answer area and arrange them in the correct order.)
Answer:
QUESTION 52
You need to identify the quality metrics that are responsible for the issues with video calls for users in the London office identified during Proof of Concept (POC) testing.
Which quality metric should you identify?
A. average packet loss rate
B. average jitter
C. maximum round trip
D. burst gap duration
Answer: A
QUESTION 53
You need to identify the quality metrics that are responsible for the poor quality of audio calls for users in the Seattle office.
Which quality metric should you identify?
A. average packet loss rate
B. maximum round trip
C. burst gap duration
D. average jitter
Answer: D
QUESTION 54
During Proof of Concept (POC) testing, the Denver office showed signs of heavy network utilization from Lync intra-site calls causing issues with production network applications.
You need to mitigate the impact of Lync call testing on the network bandwidth during POC testing. Which Lync 2013 feature should you recommend?
A. Quality of Service (QoS)
B. Location Policy
C. Call Admission Control (CAC)
D. Conferencing Policy
Answer: C
QUESTION 55
You need to determine whether the environment meets technical requirements for Lync apps on mobile devices from outside of the perimeter network.
Which two utilities should you use?
(Each correct answer presents a complete solution.
Choose two.)
A. Remote UC Troubleshooting Tool (RUCT)
B. Lync Server 2013 Control Panel
C. Remote Connectivity Analyzer
D. Lync Connectivity Analyzer
Answer: BD
Explanation:
D: Lync Connectivity Analyzer. This tool will help Lync administrators determine whether the deployment and configuration of their on-premises Lync Server environment meets the requirements to support connections from Lync Windows Store app and Lync mobile apps.
Incorrect:
Not A: RUCT is a free Windows utility for remotely diagnosing Lync Server and OCS issues. Specifically it helps to diagnose DNS configuration issues, certificate issues, and other Lync or Communicator client problems.
Not C: Test connectivity.
QUESTION 56
You need to ensure that marketing and sales executives are able to place their internal conference calls in stereo quality.
Which Lync Server 2013 edition should you deploy?
A. Lync Server 2013 Enterprise Edition
B. Lync Room System (LRS)
C. Lync Server 2013 Standard Edition
D. Lync Server 2013 Standard Edition with XMPP gateway
Answer: B
QUESTION 57
You need to identify the Lync Server 2013 features to employ in order to optimize the quality of audio calls in the Beijing office, even during heavy network load.
Which three features should you employ?
(Each correct answer presents part of the solution. Choose three.)
A. call Admission Control (CAC)
B. Mediation Server bypass
C. call Detail Recording (CDR)
D. Quality of Service (QoS)
E. Quality of Experience (QoE)
Answer: ABD
Explanation:
A: 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. The CAC design in Lync Server 2013 offers four main attributes:
It is simple to deploy and manage without requiring additional equipment, such as specially configured routers.
It addresses critical unified communications use cases, such as roaming users and multiple points of presence. CAC policies are enforced according to where the endpoint is located, not where the user is homed.
In addition to voice calls, it can be applied to other traffic, such as video calls and audio/video conferencing sessions.
Provides the flexibility to enable representation of various kinds of network topologies.
B: In Microsoft Lync Server, we recommend that you configure voice traffic to bypass the Mediation Server when possible. Doing so helps improve call quality by optimizing the media path, reducing latency, minimizing unnecessary transcoding, limiting packet loss, and eliminating potential points of failure.
Mediation Server bypass also provides you bandwidth savings in configurations where a Mediation Server and a PSTN gateway or PBX are at different sites connected by WAN links, especially if bandwidth over the link is limited. Offloading the media processing from the Mediation Server also improves scalability.
D: Quality of Service (QoS) is a networking technology used in some organizations to help provide an optimal end-user experience for audio and video communications. QoS is most- commonly used on networks where bandwidth is limited: with a large number of network packets competing for a relatively small amount of available bandwidth, Quality of Service provides a way for administrators to assign higher priorities to packets carrying audio or video data. By giving these packets a higher priority, audio and video communications are likely to complete faster, and with less interruption, than network sessions involving things like file transfers, web browsing, or database backups. That’s because network packets used for file transfers or database backups are assigned a “best effort” priority.
Incorrect:
Not C: Call detail recording (CDR) records usage and diagnostic information about peer-to- peer activities including instance messaging, Voice over Internet Protocol (VoIP) calls,
application sharing, file transfer, and meetings. The usage data can be used to calculate return on investment (ROI) and the diagnostic data can be used to troubleshoot peer-to- peer activities and meetings.
QUESTION 58
Drag and Drop Question
You need to start collecting media quality data generated by Lync during Proof of Concept (POC) testing.
Which three steps should you perform in sequence?
(To answer, move the appropriate three actions from the list of actions to the answer area and arrange them in the correct order.)
Answer:
QUESTION 59
Drag and Drop Question
You need to analyze the bandwidth impact of different video call flows at the Beijing office.
Which codec will apply to which call flow?
(To answer, drag the appropriate codec or codecs to the correct call scenario or scenarios in the answer area. Each codec 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.)
Answer:
QUESTION 60
Drag and Drop Question
You need to assess the maximum bandwidth required to replace public switched telephone network (PSTN) connections with a Session Initiation Protocol (SIP) trunking service.
Which bandwidth should you allocate for each region?
(To answer, drag the appropriate bandwidth or bandwidths to the correct SIP trunk or trunks in the answer area. Each bandwidth 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.)
Answer:
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