You have been given an IP address block of 172.16.0.0 /22. You must provide for existing networks as well as future growth.
Subnet assignments are:
1st subnet, existing student LAN, up to 400 hosts; (Fa0/0 on R2-Central)
2nd subnet, future student LAN, up to 180 hosts; (not yet implemented)
3rd subnet, existing ISP LAN, up to 40 hosts; (Fa0/0 on R1-ISP)
4th subnet, future ISP LAN, up to 18 hosts; (not yet implemented)
5th subnet, existing WAN, point-to-point link; (S0/0/0 on R1-ISP and R2-Central)
6th subnet, future WAN, point-to-point link; (not yet implemented)
7th subnet, future WAN, point-to-point link. (not yet implemented)