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Microsoft Network Readiness and Assessment for Lync Sample Questions:

1. ==========================================
Topic 1, Humongous Insurance
Background
Humongous Insurance currently employs 7,500 people and is based in the United States. The company has 4,000 users in its main office in Chicago. It also has two branch offices, one in New York with 2,000 users and the other in Los Angeles with 1,500 users. The company has 30 executives located across the offices.
The company recently migrated from Lync Server 2010 to Lync Server 2013. The company plans to increase the use of audio and video (A/V) conferencing to reduce travel costs. Employees have been asked to use A/V, telephony, and instant messaging (IM) conferencing solutions whenever possible for communication with clients and users in the branch offices.
Humongous Insurance is federated with Trey Research Corporation, which uses a third-party IM. Users at both companies need to communicate with each other by using their respective IM client.
The company plans to continuously analyze the network to identify:
- potential network delay points and
- availability of adequate bandwidth to meet current requirements and anticipated
growth.
The company plans to continuously analyze the Lync 2013 servers for performance metrics.
Planned Changes
Humongous is in discussion to acquire the Southridge Video company. Southridge Video
has 2,000 users in two sites.
Employees of Humongous Insurance use a variety of mobile devices, including Windows
Phones and iOS phones. All iOS phone users must be notified of events, such as new or
missed IM invitations and voice mail messages, even when they are using the corporate
wireless network.
All public switched telephone network (PSTN) traffic will use the G.711 codec.
All voice will use the RTAudio Wideband codec.
All peer-to-peer (P2P) video sessions will support H.264 and RTVideo codecs.
Audio bandwidth between the Los Angeles and New York offices is limited.
Challenges
All users report poor audio and video quality. Calls are dropped or suffer from jitter and lag. These issues exist when users are using the Lync client or Lync Phone Edition. Humongous Insurance users currently are unable to IM with external clients that use different IM programs.
Currently there is no network oversight for Lync communications. The company has no plans to increase the bandwidth at any sites.
Humongous Insurance does not have a defined remote user access policy.
Existing Environment
The three offices are connected to one another as shown in the following network diagram:

---
Additional information about the existing environment is shown in the Supporting
Information section:
Overview of data centers
Detail of the Chicago data center
Overview of audio and video codec bandwidths
Employees of Humongous Insurance use various operating systems, including Windows XP, Windows Vista Enterprise, Windows 7 Enterprise, and Windows 8. All users are enabled for Enterprise Voice, and many have Lync Phone Edition.
The concurrent communication modalities usage of the three offices is shown in the following table:

Humongous Insurance expects to see the number of video users increase by as much as
10 percent. The company expects to see the number of voice users increase by as much
as 15 percent.
All users at Humongous Insurance will be Lync enabled.
The company uses synthetic transactions to perform call and voice tests.
Many of the employees of Humongous Insurance work from home and sign in securely to
the corporate environment in order to use Lync.
Business Requirements
Humongous Insurance would like to review the existing network topology and wants to
ensure that network capacity will meet current Lync 2013 infrastructure capacity
requirements for audio and video usage, as well as meet the anticipated increases.
All existing issues relating to the poor quality of Lync calls and conferencing need to be
addressed.
Company policy allows for all employees to have the option to use video conferencing.
Employees will be limited to VGA video quality. Company executives will not have these
limitations.
Quality of Service (QoS) ports must be unique for audio and video traffic.
The company wants to confirm that the current network bandwidth allocated for the network
is sufficient for all current and anticipated growth in Lync traffic and would like to guarantee
high-quality Lync calls and video conferencing.
Humongous Insurance wants to ensure that the volume of Lync traffic does not exceed 50
percent of WAN bandwidth.
The recommended design solution needs to eliminate the possibility of WAN
oversubscription by Lync traffic.
Humongous Insurance wants to use only dedicated computers to monitor the network and
perform synthetic transactions to limit the load on the computers.
The proposed Lync 2013 solution needs to provide scalability to accommodate the
company's future acquisition of Trey Research.
The proposed Lync 2013 solution should be readily available for users in all three sites.
Technical Requirements
The company wants to allow only authorized employees to connect remotely.
All remote users will use a secure method when remotely connecting to the network and
the Lync environment.
The number of open and listening ports must be kept to a minimum.
All maintenance and tests of network policies must be done outside of normal business
hours.
Bandwidth between sites cannot be increased.
The quality of voice and video traffic must be increased.
The number of dropped calls must be reduced.
The corporate information technology (IT) department must be able to push updates and
scan users' computers when they are connected remotely.
All push notifications must be able to be sent mobile clients on all supported cell phone
manufactures. Many users do not use Windows mobile phones.
IM users must be able to IM with users who are using other IM programs.
The Microsoft Lync 2013 Bandwidth Calculator must be used to analyze Lync traffic.
It is recommended to deploy QoS for end-to-end support.
Mobile client users are supported only with Lync 2010 Mobile clients.

==========================================
You need to identify the current average amount of bandwidth required for public switched telephone network (PSTN) calls for all three sites.
Which bandwidth should you choose?

A) 36,375 Kbps
B) 16,800 Kbps
C) 61,725 Kbps
D) 23,250 Kbps

2. You prepare Co deliver a network assessment for a customer. The customer has four sites as described in the following table:

The results of the traffic simu-lation between New Delhi and New York are shown in the following table:

You need to analyze the data and provide the General Comments for the traffic simu-lation results. What should you recommend?

A) The network performance is less than acceptable. Average delay is outside of scope.
B) The network performance is less than acceptable. Average Jitter is outside of recommended levels. Users may complain.
C) The network performance is acceptable. Packet loss is within acceptable ranges.
D) The network performance is acceptable. Maximum consecutive datagram loss is within acceptable ranges. Users may complain.

3. ==========================
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) burst gap duration
B) average jitter
C) maximum round trip
D) average packet loss rate

4. You need to define the goals that you would like to achieve after you perform usage modeling of Lync traffic in Contoso. Which two goals should you establish? (Each correct answer presents part of the solution. Choose two.)

A) Confirm that bandwidth is sufficient for 40 new Litware, Inc. Lync users.
B) Confirm that bandwidth is sufficient for 80 new Litware, Inc. Lync users.
C) Confirm that the volume of Lync traffic does not exceed 25 percent of wide area network (WAN) bandwidth.
D) Confirm that the volume of Lync traffic does not exceed 5 megabits per second (Mbps).
E) Confirm that bandwidth is sufficient for Microsoft Office 365 Hybrid Lync deployment.

5. HOTSPOT
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:
Central sites (Click the Exhibit button.)
Branch sites (Click the Exhibit button.)


You need to identify the link that may cause issues during conferencing.
Which link shown on the network topology diagram should your customer monitor? (To answer, select the appropriate link on the network topology diagram.)

Solutions: