Just to add to that: I wasn't wrong then when I stated the subnet is determined by the IP number the router is given? (as you say, when the router's IP address is 192.168.1.1, the subnet is 192.168.1.x, when the router's IP address is 192.168.2.1, the subnet is 192.168.2.x, when the router's IP address is 192.168.3.1, the subnet is 192.168.3.x, etc...) Correct?