This reports the actual next-hop address of the adjacency forwarding element in this list, reading zero when the list has no adjacency forwarding element. This is the concrete address CEF is actually forwarding this traffic toward at this stage of the forwarding-element chain, which an admin follows directly when tracing exactly which neighbor a given prefix's traffic reaches next. Tracing a customer prefix's forwarding path, an admin might find this object holds the address of a specific peering router, confirming exactly which next hop that prefix's traffic is being sent to at this stage.