your network audit consists of the following information: somecompany consists of 11 departments spread across three buildings. each building is connected using three cisco 2800 series routers. the three routers are located in the mis wiring closet in building 2. each department has its own cisco 2950 switch. there are at least two workstations in each department. the company plans to use a class b address range starting at 172.18.0.0. each department must be assigned a subnet. subnets should be designed to allow for the maximum number of hosts on each department subnet using classful subnetting.