单项选择题
A.224.255.255.255B.255.255.255.192C.255.255.255.38D.255.224.255.255
A.IP地址192.168.1.55与192.168.1.49B.IP地址192.168.0.55与192.168.0.45C.IP地址192.168.0.55与192.168.0.43D.IP地址192.168.0.43与192.168.0.57
A.192.168.2.15/28B.10.0.2.128/26C.127.4.2.5D.12.3.4.6/24