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You need to solve the Enterprise Voice issue experienced by Sydney users.
Which normalization rule should you use for mobile numbers?
You need to configure media bypass for Tailspin Toys.
What should you do? To answer, select the appropriate Media Bypass setting from each list in the answer area.
Case Study 6 – Contoso, LTD 2 (QUESTION 33 – QUESTION 36)
Contoso, Ltd. is a Canadian business law firm that currently employs 300 people. The company operates a main office in Vancouver that houses 250 employees and a branch office in Seattle that houses 50 employees. All Contoso users are Skype for Business- enabled. Contoso is launching a hybrid configuration of Office 365 to validate the cloud- based Exchange Online service.
Contoso plans to introduce a remote disaster recovery data center to host remote replicas of key services, including Active Directory Domain Services (AD DS), Skype for Business, Exchange, and files and legal software. The company also plans to acquire a small law firm in Vancouver called Litware, Inc., which has 80 employees. Litware currently uses a 10- megabit per second (Mbps) Internet connection.
Half of Litware employees will use Skype for Business services. All Skype for Business- enabled users in Litware will use Instant Messaging only. Currently, Instant Messaging concurrent usage at Litware is 50 percent during peak hours.
There is a possibility that Contoso will make two more acquisitions during the next three years. Vancouver and Seattle employees have submitted support tickets to report poor quality of outbound Skype for Business calls to external users. A user activity report collected by the help desk department is shown in the User Activity Report section.
There is a concern that in the future, the volume of Skype for Business traffic may reach up to 50 percent of the current bandwidth available in the Vancouver office.
User Activity Report
The core portion of the infrastructure is located in the Vancouver data center, although the Seattle data center also has two servers (listed below) to provide redundancy of Active Directory and data services.
The following services and applications comprise Contoso’s infrastructure in Vancouver and Seattle.
Vancouver Data Center
Seattle Data Center
An overview of the network infrastructure of Vancouver and Seattle data centers is shown in the exhibit. (Click the Exhibit button.)
All users in the Vancouver and Seattle offices use the Microsoft Windows 8 Enterprise operating system and phones that are enabled for Enterprise voice.
Contoso expects to see a growing number of remote users. They anticipate that up to 20 percent of users in Vancouver might work remotely.
Contoso has defined a team of 35 users who will participate in a pilot deployment of the Office 365 hybrid configuration.
The offices in Vancouver and Seattle are using 5-Mbps Internet connections.
Contoso has a site-to-site VPN between the Vancouver office and the Seattle office.
All external outbound calls from the Vancouver and Seattle offices are routed outside through the office in Vancouver.
Contoso needs to review the existing network topology as well as the Skype for Business Server 2015 infrastructure to ensure that network capacity is sufficient to accommodate the Litware, Inc. Skype for Business users in the future.
Contoso expects to see up to 85 percent of simultaneous instant messaging, 1% of peer- to-peer traffic and 25 percent of public switched telephone network (PSTN) calls over the WAN during business hours.
All existing issues that relate to poor quality of outbound Skype for Business calls need to be addressed as well.
Contoso wants to ensure the following:
– Current network bandwidth allocated to the Vancouver office is sufficient to sustain the future volume of Skype for Business traffic and guarantee high quality of Skype for Business calls.
– Volume the Skype for Business traffic does not exceed 25 percent of the WAN bandwidth.
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).
The recommended design solution needs to eliminate the possibility of WAN oversubscription by Skype for Business traffic.
The proposed Skype for Business Server 2015 solution needs to be:
– Scalable to accommodate the company’s future acquisitions.
– Readily available for Vancouver and Seattle users.
In case of a disaster, a manual switchover of Skype for Business services to the disaster recovery datacenter should be available.
All Session Initiation Protocol traffic (SIP) traffic must be encrypted.
All external Skype for Business Server 2015 services must be protected by a firewall.
A commercial third-party certificate must be used on the external interface of Skype for Business Server 2015 Edge servers.
The Role-Based Access Control (RBAC) model will be implemented to delegate basic administrative tasks to the Skype for Business help desk team.
All maintenance of Skype for Business servers must be performed outside of business hours.
The proposed architecture solution must support interoperability between Skype for Business Server 2015 and Exchange 2013.
The Skype for Business Bandwidth Calculator must be used to analyze Skype for Business traffic. The QoS end-to-end support needs to be implemented.
Drag and Drop Question
You are developing a design solution to eliminate the possibility of wide area network (WAN) over -subscription by Skype for Business 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.
You need to estimate the volume of Skype for Business traffic.
In the Skype for Business Calculator, which options should you select? To answer, select the appropriate branch site or sites in the Skype for Business Bandwidth Calculator.
You need to estimate the future volume of Skype for Business traffic in the Vancouver office.
Which two employee totals should you use for the estimate? Each correct answer presents part of the solution.
A. 300 employees at Contoso, Ltd.
B. 80 employees at Litware, Inc.
C. 40 employees at Litware, Inc.
D. 35 hybrid users at Contoso, Ltd.
You need to define the goals that you would like to achieve after you perform usage modeling of Skype for Business traffic.
Which two goals should you establish? Each correct answer presents part of the solution.
A. Confirm that bandwidth is sufficient for 40 new Litware, Inc. Skype for Business users.
B. Confirm that the volume of Skype for Business traffic does not exceed 5 megabits per second (Mbps).
C. Confirm that bandwidth is sufficient for 80 new Litware, Inc. Skype for Business users.
D. Confirm that the volume of Skype for Business traffic does not exceed 25 percent of wide area network (WAN) bandwidth.
E. Confirm that bandwidth is sufficient for Microsoft Office 365 Hybrid Skype for Business deployment.
You support Skype for Business Server 2015 servers in your customer’s network.
The network includes two branches connected with an 8 megabits per second (Mbps) network circuit. The circuit has 1 Mbps of dedicated bandwidth for Skype for Business voice traffic.
The network is required to handle 50 peer-to-peer (P2P) calls at a minimum.
Users report that calls between the branches are being dropped, and voice quality is degraded.
Skype for Business audio codecs:
You need to calculate appropriate bandwidth for the P2P call volume required.
What is the minimum dedicated bandwidth that you should allocate?
A. 1.2 Mbps
B. 1.4 Mbps
C. 1.9 Mbps
D. 2.2 Mbps E. 2.3 Mbps
You support a Skype for Business Server 2015 environment that consists of the following:
A single Skype for Business Server 2015 Standard Edition pool that is located in a main office.
Four branch offices that are connected by a 9 megabits per second (Mbps) dedicated wide area network (WAN) link, each of which has 300 users.
You need to be able to support 75 concurrent calls.
Users in the branch offices report poor quality audio during conferences.
You perform the following troubleshooting steps:
Implemented Quality of Service (Qos) and Call Admission Control (CAC). In CAC, defined the main office and each branch office as a site In CAC, associated subnets to the relevant sites. Provisioned policy-based QoS for media traffic.
Poor audio quality persists.
You run the Skype for Business Management Shell Get-CsNetworkSite cmdlet.
The relevant portion of the results are shown below:
You need to improve audio quality.
What should you do?
A. Create a region route to route network traffic between the CAC sites.
B. Create a bandwidth policy profile with an Audio Session Limit of 40 Kbps. Assign the profile to the centralsite.
C. Create a bandwidth policy profile with an Audio Session Limit of 40 Kbps and an Audio Limit of 3 Mbps.Assign the profile to each branch site.
D. Create a bandwidth policy profile with an Audio Session Limit of 40 Kbps and an Audio Limit of 1 Mbps.Assign the profile to each branch site.
Drag and Drop Question
You have a Skype for Business Server 2015 infrastructure.
You have one Enterprise Edition pool named pool1.contoso.com.
Enterprise Voice is enabled for all users.
You have a public switched telephone network (PSTN) gateway named mg1.contoso.com that does not support secure signaling. The Encryption support level of the global trunk configuration is set to Not Supported.
You add a second PSTN gateway named mg2.contoso.com. The SIP General parameters for mg2.contoso.com are configured as shown in the following table.
On mg2.contoso.com, you generate and install a certificate from an internal certification authority (CA).
You need to ensure that Skype for Business Server 2015 can use both PSTN gateways to make calls on the PSTN.
Which four actions should you perform in sequence? To answer, move the appropriate actions from the list of actions to the answer area and arrange them in the correct order.
Your company has a Skype for Business Server 2015 infrastructure.
You need to ensure that users can answer calls placed to other users by using the Group Call Pickup feature.
Which Skype for Business Management Shell cmdlet should you run?
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