... tables for the organization, but it doesn’t intro-duce any additional entry on core routers. CHAPTER 1 Overview During the years between the end of the second millen-nium and the beginning of the ... Digest (MD). Among the most frequently used algo- Chapter Eight154Figure 8-1Examples of use ofthe AH headerFigure 8-2Structure of the AHheader CHAPTER 6NeighborDiscoveryNeighbor Discovery ... happened to IPv5? It lost the race, and thereforeeveryone agreed not to use that version number.1 Chapter Seven15023S.E. Deering, RFC 1112: Host extensions for IP multicasting, August1989.24D....