Serge is responsible for deploying 100 new workstations on his company network, and he wants to use the multicasting capabilities of Windows Deployment Services to minimize the amount of bandwidth required. He has already built a reference computer and captured an image of it using Microsoft Deployment Toolkit 2010. After adding the captured image and the boot image created by MDT to his WDS server, he configures the WDS multicasting parameters and performs a test by initiating a deployment on five new target workstations at the same time, while capturing network traffic samples with a protocol analyzer. Examining the traffic analysis afterward, Serge realizes that no multicasting has occurred. What is the problem, and how can he resolve it.