【单选题】一个标准的C类IP地址195.168.10.1,它的网络地址是()。
【单选题】一个标准B类地址的默认子网掩码为( )。
【判断题】IP地址202.93.120.45如果是一个标准分类的IP地址,那么它属于C 类地址,该地址的掩码是 255.255.255.0,网络号是202.93.120.0,这个网络的受限广播地址是255.255.255.255 。
【简答题】Jane arrived (____) in Shanghai last night.
【判断题】一个标准的C类地址的网络标识由其IP的前2个字节所构成。xh18
【单选题】——Has Jane arrived yet? ——No, she_______ an hour ago.
【单选题】---Why hasn’t Jane arrived yet? ---She ______ again in the morning.
A.
shouldn’t have overslept
B.
may have turned off the alarm clock
C.
must have no one to call her
D.
should have someone to wake her up