HOTSPOT
You are the Skype for Business architect for your company.
You have offices in the following locations:
* Amsterdam: 800 employees
* New York: 6,000 employees
* Paris: 400 employees
Your company is located in the United States and is now expanding rapidly into Europe.
Each location has its own connection to the public switched telephone network (PSTN).
* You need to plan an environment that meets the following requirements:
* Provide national phone numbers for dial-in conferencing.
* Provide PSTN conferencing functionality in North America and in Europe.
* Minimize local infrastructure.
* Minimize infrastructure investments.
Which environment should you plan to deploy for each office? To answer, select the appropriate option from each drop-down menu.

HOTSPOT
You have a Skype for Business Server 2015 infrastructure as shown in the exhibit. Click the Exhibit button.
The infrastructure contains an Enterprise Edition Front End pool.
You plan to deploy Persistent Chat.

The solution must minimize the deployment of additional servers whenever possible.
You need to identify the placement of the components required for Persistent Chat.
Where should you deploy the Persistent Chat components? To answer, select the appropriate server to deploy each component in the answer area.

Contoso, Ltd. has a Skype for Business Server 2015 environment that uses open federation. The perimeter network topology is shown in the exhibit. Click the Exhibit button.

The public certificates on the external interfaces of the Skype for Business Edge and Reverse Proxy are as follows:

Audio calls to federated partners that also use Skype for Business Server 2015 are not working.
You need to correct the issue of the failed audio calls.
What should you do?

• A. On the external firewall to the AV Edge Service External IP address, open the inbound and outbound UDP and TCP port range 50000-59999.
• B. On the external firewall to the Access Edge Service External IP address, open the inbound and outbound UDP port 5061.
• C. On the external firewall to the AV Edge Service External IP address, open the inbound and outbound UDP port 3478.
• D. On the reverse proxy external interface, add "lyncdiscover.contoso.com" as a subject alternative name to the public certificate.
• E. On the reverse proxy external interface, add "contoso.com" as a subject alternative name to the public certificate.

DRAG DROP
You have a Skype for Business Server 2015 environment. You plan to deploy a Persistent Chat server.
You need to create the chat room for the Human Resources department.
Which three actions should you recommend? To answer, move the three appropriate actions from the list of actions to the answer area and arrange them in the correct order.

DRAG DROP
You have a Skype for Business Server 2015 infrastructure that contains two servers. The servers are configured as shown in the following table.

You deploy a new server named Server3.contoso.com.
You need to install the Edge Server role on Server3.contoso.com.
In which order should you perform the actions? To answer, move all actions from the list of actions to the answer area and arrange them in the correct order.