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Microsoft 74-335 Exam Syllabus Topics:

Microsoft Network Readiness and Assessment for Lync Sample Questions:

Question 1

You need to implement a traffic regulation mechanism to monitor and classify packets, both incoming and outgoing, with the ability to remark excess traffic.
What should you use?

A. a queuing technique
B. traffic policing
C. traffic shaping
D. Call Admission Control (CAC)

Question 2

==========================
Topic 5, Lucerne Publishing
Background
Lucerne Publishing is an international publishing company headquartered in Seattle. Lucerne specializes in computer technology books and popular science magazines. The company was founded in 2001 and has since expanded significantly through multiple acquisitions. Lucerne Publishing has four main editorial offices, located in Seattle, Denver, London, and Beijing. The company also has more than 50 bookstores and publishing units distributed worldwide, with the biggest bookstore and library located in Glasgow.
Today the company has 2,900 employees worldwide:

Proof of Concept Deployment
Lucerne Publishing has a proof of concept (POC) deployment of Lync 2013.
During the POC testing, users reported the following: - 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. - In the London office, users often experience issues with video calls during
business hours, such as video freezing or video not being available during conferences.
The management team would like to rectify the issues which users have reported before proceeding with an implementation.
Existing Environment
The existing application environment includes the following components: - An Active Directory (AD) domain named lucepub.com with two regional subdomains named uk.lucepub.com and ch.lucepub.com. - A Microsoft Exchange 2010 organization with MS Exchange 2010 servers in Seattle and London.
The Beijing office has an Office Communications Server (OCS) 2007 R2 deployment, including Group Chat.
Each editorial office has a datacenter to support local infrastructures. The existing network infrastructure is configured as shown in the Network Topology Diagram exhibit.
The data centers connect to each other by using a Multiprotocol Label Switching (MPLS) network with wide area network (WAN) links that have the following characteristics:

Peak phone usage in the main offices is as follows:

Client computers in each office are connected to a switched 100 Mbps Power over Ethernet (PoE) port, and servers are connected to 1-Gigabyte per second (Gbps) Ethernet ports. Corporate firewalls are installed at all locations, and Quality of Service (QoS) is available globally on the network equipment.
Business Requirements
Lucerne Publishing has the following requirements to validate the POC Lync Server 2013 deployment:
- Evaluate audio call quality and confirm that the public switched telephone network (PSTN) long distance calls are not required for interoffice communication.
- Evaluate the new collaboration tools and services (including conference calls, audio and video calls, instant messaging (IM), and screen sharing) and obtain user feedback.
- Model the call flow of video conference calls for the Beijing office users who will need to continue using OCS 2007 R2 client software during the coexistence phase of the deployment.
- Estimate the effectiveness of replacing the local PSTN connections in each office with centralized session initiation protocol (SIP) trunking services (one per region: North America, Europe, and Asia).
- Ensure optimal audio quality of phone calls and conferences between all company offices.
- Support stereo audio for marketing and sales executives for internal conference calls to provide a high quality user experience.
Lucerne Publishing also requires that the following Lync 2013 components and maintenance tasks be evaluated:
- Back-end and network performance reports for business hours are generated on a daily basis. - Today's performance reports for the Seattle office and the London office are shown in the Performance Reports section. - The existing solution for monitoring network utilization between all major locations will trigger an alert if utilization becomes high.
Also, Lucerne Publishing has the following minimum requirements for the Beijing office: - Ensure that the office link is not saturated with Lync 2013 traffic, and that other
network services are not impacted by it. - Implement Call Admission Control (CAC) to ensure the quality of the connection. - Implement QoS to ensure that services other than Lync 2013 are not
compromised.
Scalability of the solution is very important to Lucerne Publishing. The company has future acquisition plans, and it must be easy to integrate new offices and sites into the existing infrastructure to provide enterprise voice, messaging, and email solutions. It should also be easy to add additional servers to the existing locations in case those location experience growth and add users.
Finally, the solution must provide high availability (HA) and disaster recovery (DR) capabilities. It must provide failover and voice resilience mechanisms in case of single server or entire pool or site failure. For branch offices, voice resilience must be increased by using Survivable Branch Appliances (SBAs) or Survivable Branch Servers (SBSs).
Technical Requirements
Lucerne Publishing will need to be able place a server offline for maintenance without impacting Enterprise Voice.
All Lync traffic should be encrypted, and integrated security of Lync devices should be used when possible.
The solution must support: - Microsoft Lync Phone Edition - Connections from the Lync app from Windows Store for Windows 8 and Windows
RT, and from Lync apps on mobile devices
- Interoperability with devices manufactured by participants in the Lync
Interoperability program
- Interoperability with Skype clients
The existing implementation of WAN/LAN/Wi-Fi and QoS must also be supported.
==========================
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. burst gap duration
C. maximum round trip
D. average jitter

Question 3

Your company's 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 6,500 users enabled for Lync 2013 video conferencing. Only RTVideo is being used for video conferencing. On average, 12 percent of users are on a video conference at any one time. The company plans to add additional bandwidth for all sites.
The company is concerned about the quality of video conferences.
As part of a bandwidth upgrade process, you model real-time transport protocol (RTP) media call flows for video communications that use only RTVideo. You have determined the average number of video conferences and estimated the bandwidth required for the video portion.
You need to identify the additional bandwidth requirements when modeling real-time transport control protocol (RTCP).
Which bandwidth option should you choose?

A. 15 kilobits per second (kbps) per stream
B. 10 kilobits per second (kbps) per stream
C. 30 kilobits per second (kbps) total
D. 10 kilobits per second (kbps) total

Question 4

===============================
Topic 4, Fabrikam Inc.
Background
Fabrikam, Inc. is a worldwide leader in production and sales of cameras, lenses, flashes, and photography accessories. The company employs 6,500 people worldwide.
The company has its main office in Tokyo; three data centers in Tokyo, New York, and Prague; ten manufacturing units across China; and branch offices in 20 other cities. The network diagram for Fabrikam, Inc. is shown in the exhibit. (Click the Exhibit button.)

For the pilot project, a Front End Server and an Edge Server will be located at the New
York data center. Test users will be located in the Tokyo main office and outside the
Fabrikam network over a public Internet connection.
The company plans to replace the existing traditional non-standard analog Private Branch
Exchange (PBX) implementations with a modern collaboration and telephony solution. This
modernization should allow employees to collaborate efficiently and reduce the company's
phone bills at the same time.
A proposal was made to accomplish this by testing and implementing a Microsoft Lync
2013 infrastructure.
For cost effectiveness, the company wants to utilize the existing network infrastructure
when implementing the Lync 2013 infrastructure.
The company needs to make sure the existing network infrastructure is ready for Lync
2013 implementation by analyzing:
Wide area network (WAN) infrastructure,
Wi-Fi infrastructure, and
Quality of Service (QoS) approaches.
During analysis, rogue access points (APs) were detected, so management wants to
secure the Fabrikam, Inc. wireless network infrastructure.
The company wants to design and implement a wireless local area network controller
(WLC) to minimize operational complexity and support.
---
---
During the test phase of implementation, Lync Phone Edition device users are experiencing voice degradation when they use audio with other Lync users, There are no reports of any problems between Lync phone communications.
Upper management is very concerned about ensuring security over a public network. The recommended solution should use secured protocols such as Transport Layer Security (TLS), Mutual Transport Layer Security (MTLS), or secure real-time transport protocol (SRTP).
Existing Environment
The company's existing environment includes:
a domain controller,
a Microsoft Exchange 2013 infrastructure server, and
a Microsoft SharePoint 2013 server.
The existing analog PBX telephony has reached its capacity in most locations.
Currently the company has a mix of Multiprotocol Label Switching (MPLS) Layer-3 network
and Internet Protocol security (IPSec) using an Asymmetric Digital Subscriber Line (ADSL)
between their locations, a remote VPN network for remote/on-field employees, and Wi-Fi
point-to-point links between buildings within the same locations, as well as internal Wi-Fi
access points. QoS is enabled globally for all WAN and LAN connections. Corporate
firewalls are installed at all locations.
At the Fabrikam, Inc. main office, there are three wireless access points (WAPs) deployed
with no Remote Authentication Dial-In User Service (RADIUS)/AAA. All of them are
configured for channels 2 or 7 with the same Service Set Identifier (SSID) and Wi-Fi
Protected Access-Pre-Shared Key (WPA-PSK).
Users at the main office use the wireless infrastructure, and as users roam they do not
switch over to different WAPs but stay associated with the original WAP until the signal is
completely gone. Then the wireless signal associates with the closest WAP.
For Lync Phone edition devices, QoS is set to its default.
The company's network platforms support only four queues with QoS-based admission.
The company uses traffic shaping and traffic policing.
Business Requirements
Employees travel between sites and require stable and reliable collaboration and phone solutions. The company wants to reduce investment in telecommunications, overseas calling, roaming, and conference call charges. Branches should be able to support up to 24 simultaneous peer-to-peer (P2P) calls between sites.
Employees should be able to call any phone number at any time, be visible, and be able to chat and use audio conferencing.
The company plans to deploy wireless LAN controllers (WLCs) for wireless management and monitoring, and wants to deploy Wireless IP phones in the main office. The company wants to map the Differentiated Services Code Point (DSCP) markings to industry best practices for all media types.
The proposed solution:
- must operate effectively for the entire company, including all locations and remote users, - must be reliable and recoverable in case of network or other problems affecting
any site,
- should offer rapid deployment,
- should be scalable, and
- should consolidate chat, phone, and email.
Technical Requirements
All Session Initiation Protocol (SIP) signaling and media traffic must be encrypted. The company wants integrated security within phones and servers, and Wi-Fi secured communications for WPA/WPA2. The new system should be highly available and should remain fully functional if any one server fails.
The proposed solution must be compatible with most known video and audio device manufacturers. The audio codec bandwidth is shown in the following table:

Fabrikam uses RTAudio Wideband. Call Admission Control (CAC) is disabled for VPN users. The company's existing network supports MPLS, IPSec VPN, and Remote VPN networks. WAP Infrastructure and WLC placement must be cost effective, with capacity management allowing high availability. QoS is currently deployed with non-standard setting for DSCP marking on the TCP/IP packets. Voice over IP (VoIP) requires service guarantees regardless of network conditions.
===============================
You need to recommend channel distribution to resolve the voice over wireless local area network (WLAN) interference problem.
Which channel distribution should you recommend?

A. Use channels 2, 5, and 10.
B. Use a four-channel solution.
C. Use channels 1, 6, and 11.
D. Use a single-channel solution.

Question 5

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. calls simu-lation over the WAN link
B. calculation of server-to-server generated Lync traffic
C. Quality of Service (QoS) configuration
D. RTC traffic estimation over the WAN link
E. calculation of user-generated Lync traffic

Solutions: