Tree Component Alternatives to the Composite Design Pattern. An alias-free Composite pattern using an indexed tree

The reply contains E 's network address and FLIP address, which are then entered into A 's routing table. From this point on, communication between A and E happens using normal point-to-point communication. No more broadcasts are needed. Fig. 7-19. Three LANs connected by a WAN. Communication over the wide-area network is encapsulated in whatever protocol the wide-area network requires. For example, on a TCP/IP network, C might have open connections to D and G all the time. Alternatively, the implementation might decide to close any connection not used for a certain length of time. Although this method does not scale well to thousands of LANs, for modest numbers it works quite well. In practice, few servers move, so that once a server has been located by broadcasting, subsequent requests will use the cached entries. Using this method, a substantial number of machines all over the world can work together in a totally transparent way. An RPC to a thread in the caller's address space and an RPC to a thread halfway around the world are done in exactly the same way ...»