Forwarding table 4 billion possible entries Destination Address Range Link Interface 11001000000101110001000000000000 through 11001000000101110001011111111111 11001000000101110001100000000000 through 1 11001000000101110001100011111111 11001000000101110001100100000000 through 2 11001000000101110001111111111111 otherwise Network Layer 4-17 Network Layer 4-17 Forwarding table Destination Address Range Link Interface 11001000 00010111 00010000 00000000 through 0 11001000 00010111 00010111 11111111 11001000 00010111 00011000 00000000 through 1 11001000 00010111 00011000 11111111 11001000 00010111 00011001 00000000 through 2 11001000 00010111 00011111 11111111 otherwise 3 4 billion possible entries