This holds the network prefix address that was the target of a longest-match search request, whose type, IPv4 or IPv6, is determined by the paired cefLMPrefixDestAddrType object. This is the actual destination address a management application was asking CEF to resolve via longest-match lookup, so reading it back confirms exactly which address the search result, state, matched path, in the same row pertains to. A management application troubleshooting reachability to 203.0.113.45 would see that address reflected back in this object within the search-request row it created, confirming the lookup was performed against the intended target.