Free CompTIA Network+ N10-008 Practice Question

The correct answer is 'IGMP snooping is disabled on the switches', as IGMP snooping is a feature that allows a switch to filter multicast traffic so that it is only forwarded to ports that have members interested in that traffic. When IGMP snooping is disabled, a switch treats multicast traffic like broadcast traffic, sending it to every port which can cause multicast flooding. The incorrect options are misleading because disabling STP would lead to possible switching loops, but not specifically multicast flooding. The presence of a rogue DHCP server or an incorrect VLAN assignment would cause other types of network issues, such as IP conflicts or traffic being segmented improperly, but would not directly cause multicast traffic to flood every port on a switch.