题目内容：

CCNA IP 计算题
Which command would correctly configure a serial port on a router with the last usable host address in the 192.216.32.32/29 subnet?A.router (config-if)# ip address 192.216.32.38 255.255.255.240 B.router (config-if)# ip address 192.216.32.39 255.255.255.224 C.router (config-if)# ip address 192.216.32.63 255.255.255.248 D.router (config-if)# ip address 192.216.32.39 255.255.255.248 E.router (config-if)# ip address 192.216.32.63 255.255.255.248 F.router (config-if)# ip address 192.216.32.38 255.255.255.248 Answer:F 怎么算出来的