单项选择题
133.34.43.13/28的网络地址是()
A.133.34.43.0 B.133.34.43.255 C.133.34.0.0 D.133.34.255.255
单项选择题 133.34.43.13/28的广播地址是()
单项选择题 58.135.226.254是()
单项选择题 172.14.13.40是()