Vendor: Microsoft
Exam Code: 74-335
Exam Name: Lync Network Readiness Assessment
Version: 14.79
QUESTION 61
You need to identify the root cause of call quality issues and presence issues that are represented on the Back-End Performance Seattle report.
Which two values should you examine?
(Each correct answer presents part of the solution. Choose two.)
A. average jitter
B. average network MOS
C. average listening MOS
D. average round trip
E. packet utilization
Answer: AD
Explanation:
* From scenario:
In the Seattle office, there were significant delays in the Presence status updates. In the Seattle office, the quality of audio calls is often poor during business hours.
* Client Alerting thresholds from the Work smart guide To summarize: calls that exceeded 10% average packet loss, 50% max packet loss, 500ms latency or 30ms Jitter, or have a healer metric exceeding .007 for concealing, should be investigated.
* Example:
Skarmbild av VOIP-testresultatet
QUESTION 62
Your client network includes a main office located in Toronto and five branch offices connected to the main office by a Multiprotocol Label Switching (MPLS) network. The main office is connected to the Internet through a 100 Mbps link.
You complete Lync traffic modeling based on the values provided by the client- The relevant portions of Lync Bandwidth Calculator tool information include:
– Site definitions and its WAN link info as shown in the exhibit (Click the Exhibit button.)
– Central Sites RTC Bandwidth Required Vs. Available as shown in the exhibit (Click the Exhibit button.)
– Branch Sites RTC Bandwidth Required Vs. Available as shown in the exhibit (Click the Exhibit button.)
You prepare a final report with the results of the Lync network readiness assessment.
You need to include a recommendation in the report.
What should you recommend to the client?
A. Upgrade the WAN link in the Regina office to at least 15 Mbps.
B. Allocate 4 Mbps bandwidth of WAN link to RTC traffic in the Regina office.
C. Upgrade the WAN link in the Montreal office at least to 20 Mbps.
D. Allocate 30 Mbps bandwidth of WAN link to RTC traffic in the Toronto office.
Answer: D
QUESTION 63
Your company corporate telephony environment is a combination of Lync 2013 and traditional Private Branch Exchange (PBX). The sites 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. The company plans to add additional bandwidth for all sites.
The company is concerned about the number of dropped calls on the PBXs.
As part of a bandwidth upgrade process, you model real-time transport protocol (RTP) media call flows for audio communications.
You have determined the average number of calls and estimated the bandwidth required for the audio portion of the calls.
You need to identify the additional bandwidth requirements when modeling real-time transport control protocol (RTCP) traffic.
Which bandwidth option should you choose?
A. 5 kilobits per second (kbps) per stream
B. 20 kilobits per second (kbps) per stream
C. 5 kilobits per second (kbps) total
D. 20 kilobits per second (kbps) total
Answer: A
QUESTION 64
Drag and Drop Question
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.)
Answer:
QUESTION 65
Your corporate telephony environment is a combination of Lync 2013 and traditional Private Branch Exchange (PBX). Currently, the company has 2,000 users. The company expects to add an additional 2,000 users during the next year.
On average, the company has 20 percent of its users on a public switched telephone network (PSTN) call at any time. Currently, users make three or more PSTN calls per hour, and it is expected that the new users will make a similar number of calls.
The circuit count for light, medium, and heavy traffic is shown in the table below:
You need to recommend the number of ports required by the PBXs for simulated current usage and the expected growth. How many ports should you recommend?
A. 40
B. 54
C. 80
D. 160
Answer: D
QUESTION 66
You analyze Lytic traffic modeling for a customer’s network. The network includes a main office, a data center, and five branch offices. Lync servers are consolidated in the data center. The main office and the data center are connected to a Multiprotocol Label Switching (MPLS) network. The branch offices are connected to the main office with virtual private network (VPN) links. The model uses all Lync modalities for all users. The network topology diagram is shown in the exhibit. (Click the Exhibit button.)
The model indicates that the main office exceeds the bandwidth available for Lync over the MPLS link by 10 percent. The utilization of VPN links available for Lync traffic is at almost 100 percent.
You need to recommend a change to optimize Lync traffic through the main office MPLS link.
What should you recommend?
A. Move the Lync pool to the main office.
B. Move the Lync pool to a branch office.
C. Deploy a Survivable Branch Appliance (SBA) at all branches.
D. Deploy a Survivable Branch Appliance (SBA) at the main office.
Answer: A
QUESTION 67
Woodgrove Bank plans to implement Lync 2013 for all voice and video enterprise communications.
The bank’s network topology is shown in the exhibit. (Click the Exhibit button.)
The bank wants to design a Lync Server traffic simu-lation before the production implementation.
You need to determine the locations to test the Lync Server traffic simu-lation.
Which locations should you test?
A. Main office in Boston
Data centers in New York, Prague, and Beijing
One branch in North America
One branch in Europe
One branch in Asia
B. Main office in Boston
Data center in New York
All sites that have connectivity issues
C. Main office in Boston
Data centers in New York, Prague, and Beijing
Two branches in North America
One branch in Europe
Three branches in Asia
D. Main office in Boston
Data centers in New York, Prague, and Beijing
Ten branches in North America
Five branches in Europe
Ten branches in Asia
Answer: C
QUESTION 68
Drag and Drop Question
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.)
Answer:
QUESTION 69
Drag and Drop Question
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 simu-lation results for each branch office are shown in the following exhibits:
– Helsinki Lync traffic (Click the Exhibit button.)
– Stockholm Lync traffic (Click the Exhibit button.)
You prepare a final slide presentation that shows the assessment results.
You need to include recommendations for the branch offices in the presentation slides.
Which recommendation should you make for each branch office?
(To answer, drag the appropriate recommendation or recommendations to the correct branch office or offices in the answer area. Each recommendation may be used once or not at all. You may need to drag the split bar between panes or scroll to view content.)
Answer:
QUESTION 70
Hotspot Question
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.)
Answer:
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