i read the article at http://wiki.mikrotik.com/wiki/Testwiki/IP_addressing_and_subnetting_principles and i'm mildly confused. about 2/3 down the page an example is given of 173.120.0.0/18. this resulting in 4 subnets with a possible 62 host. addresses at 173.20.0.0, 173.20.0.64, 173.20.128, and 173....