You have a Remote Desktop Session Host (RD Session Host) server farm. All of the RD Session Host
servers use Per Device licensing mode. You have 100 Remote Desktop Services client access licenses
(RDS CALs). Your network contains 100 users. Each user has a desktop computer. Twenty client
computers run Windows XP Professional Edition, 20 client computers run Windows Vista
Professional, and 60 client computers run Windows 7 Enterprise. All of the users use RemoteApps
that are published in the RD Session Host farm. You replace the Window XP client computers with
new desktop computers that run Windows 7 Professional. You replace the Windows Vista client
computers with new desktop computers that run Windows 7 Enterprise. Your company hires 10 new
employees. For each new employee, the company purchases a new laptop that run Windows Vista
Ultimate. You need to identify the total number of RDS CALs the company must purchase to ensure
that all of the client computer are licensed to access the Remote Desktop servers. The solution must
minimize costs. How many RDS CALs should the company purchase?

A.
50

B.
20

C.
10

D.
30

Explanation:

Every device needs an RDS-CAL whatever operating system it’s running. The company will end up
with 110 computers so 10 additional CALs are required. Ref:
http://www.microsoft.com/en-us/server-cloud/windows-server/remote-desktop-services-buy.aspx