Refer to the exhibit.
ROUTER#show ip route
192.168.12.0/24 is variably subnetted, 9 subnets, 3 masks
C 192.168.12.64/28 is directly connected, Loopback1
C 192.168.12.32/28 is directly connected, Ethernet0
C 192.168.12.48/28 is directly connected, Loopback0
O 192.168.12.236/30 [1 10/128) via 192.168.12.233,00:35:36, Serial0
C 192.168.12.232/30 is directly connected, Serial0
O 192.168.12.245/32 [1 10/782] via 192.168.12.233,00:35:36, Serial0
O 192.168.12.240/30 [1 10/128] via 192.168.12.233,00:35:36, Serial0
O 192.168.12.253/32 [1 10/782] via 192.168.12.233,00:35:37, Serial0
O 192.168.12.249/32 [1 10/782] via 192.168.12.233,00:35:37, Serial0
To what does the 128 refer in the router output O 168.12.240/30 [110/128] via 192.168.12.233,00:35:36, Serial0 ?