show ip route コマンドの出力を示す:Router# show ip route Last resort Gateway of last resort is 10.119.254.240 to network 10.140.0.0 O 172.16.0.0 [110/5] via 10.19.24.6, 0:01:00, Ethernet2 B 172.17.12.0 [200/128] via 10.19.24.24, 0:02:22, Ethernet2 O 172.71.13.0 [110/5] via 10.19.24.6, 0:00:59, Ethernet2 O 10.13.0.0 [110/5] via 10.19.24.6, 0:00:59, Ethernet2 出力中の値110は何を表していますか?