You need to deploy and enable Quality of Service (QoS) on all workstations to meet the planned changes and performance goals.
Which three actions should you perform? Each correct answer presents part of the solution.
A. Configure the Group Policy object (GPO) that configures QoS and set the value to Enforced.
B. Create Group Policy objects (GPOs) for Skype for Business audio and video and configure them to use the same port ranges and Differentiated Services Code point (DSCP) values for QoS.
C. Upgrade all Windows XP and Windows Vista workstations to Windows 7 or above.
D. Create Group Policy objects (GPOs) for Skype for Business audio and video and configure them to use different port ranges and Differentiated Services Code Point (DSCP) value for QoS.
E. Apply Service Pack 3 to all Windows XP workstations and Service Pack 2 to all Windows Vista workstations.
