You have a Lync Server 2013 infrastructure that contains two servers. The servers are configured as shown in the following table.
You deploy two new servers. The servers are configured as shown in the following table.
You need to recommend changes to the infrastructure to meet the following requirements:
Ensure that remote users can connect to the network by using Microsoft Lync 2013.
Ensure that Server3 authenticates the remote users before the users connect to a Front End Server.
Which Lync Server 2013 server role should you recommend deploying to each server?
To answer, drag the appropriate server role to the correct server in the answer area. Each server role may be used once, more than once, or not at all. Additionally,
you may need to drag the split bar between panes or scroll to view content.
Select and Place:
Answer: 
Explanation:
Note:
* Edge Server enables your users to communicate and collaborate with users outside the
organization’s firewalls. These external users can include the organization’s own users who are
currently working offsite, users from federated partner organizations, and outside users who have
been invited to join conferences hosted on your Lync Server deployment.
* A Director is a server running Lync Server 2013 that authenticates user requests, but does not
home any user accounts. You optionally can deploy a Director in the following two scenarios:
/ If you enable access by external users by deploying Edge Servers, you should also deploy a
Director. In this scenario, the Director authenticates the external users, and then passes their
traffic on to internal servers. When a Director is used to authenticate external users, it relieves
Front End pool servers from the overhead of performing authentication of these users. It also
helps insulate internal Front End pools from malicious traffic such as denial-of-service attacks. If
the network is flooded with invalid external traffic in such an attack, this traffic ends at the
Director.
/ If you deploy multiple Front End pools at a central site, by adding a Director to that site you
can streamline authentication requests and improve performance. In this scenario, all requests go
first to the Director, which then routes them to the correct Front End pool.
Overview of the Director