On our Cisco 1941, we have 2 gigabit ethernet ports and a 4 port fast ethernet switch EHWIC card configured as follows:GigabitEthernet0/0 131.x.x.81 255.255.255.248 - internalGigabitEthernet0/1 131.y.y.234 255.255.255.252 - WANVlan2 192.168.0.249 255...