This is the World Wide Name of the remote FC entity that a specific statically-configured route applies to, used when dynamic discovery via SLPv2 is not in use and routes must be defined manually. Because this ties a static route to a specific remote entity's identity, it is the field that ensures FC frames destined for that entity follow the manually-defined path rather than being subject to any dynamic discovery process that might resolve differently. A statically-configured route pointing at a disaster-recovery site's known WWN ensures FC traffic to that DR fabric always takes the pre-determined path, even if SLPv2 discovery elsewhere on the network would have suggested a different route.