To ensure each host has valid multipathing, it's crucial to verify the network configuration. First, verify that the VLANs are properly configured on the switches to ensure that network traffic is appropriately segmented and prioritized (A). Additionally, verify the VLAN configuration on the ONTAP cluster to ensure proper routing and communication between the storage nodes and the initiators (D). While the iSCSI service being started is important, the presence of IQNs in the exhibit indicates it is already active. ALUA is configured at the host level and not relevant to the switch configuration.