13.1 IP ROUTER DESIGN13.2 IP ROUTE LOOKUP BASED ON CACHING TECHNIQUE13.3 IP ROUTE LOOKUP BASED ON STANDARD TRIE STRUCTURE13.4 PATRICIA TREE13.5 SMALL FORWARDING TABLES FOR FAST ROUTE LOOKUPS13.6 ROUTE LOOKUPS IN HARDWARE AT MEMORY ACCESS SPEEDS13.7 IP LOOKUPS USING MULTIWAY SEARCH13.8 IP ROUTE LOOKUPS FOR GIGABIT SWITCH ROUTERS13.9 IP ROUTE LOOKUPS USING TWO-TRIE STRUCTUREREFERENCES