In CIDR notation, which of the following networks contains host 192.168.14.2? ()
A. 192.168.11.0/21
B. 192.168.10.0/22
C. 192.168.12.0/23
D. 192.168.13.0/24
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Which of the following is a correct subnet mask?
A. 255.255.224.0
B. 254.255.224.0
C. 255.255.226.0
D. 255.255.256.0
[ 判断题 ] (2分) All communication activity in Internet governed by protocols. ( )(2.0)
A. True
B. False
which service of the following can be provided by TCP?
A. Reliable data transfer
B. Throughput
C. Timing
D. Security
[ 判断题 ] FTP控制连接是持久的:在整个用户会话期间一直保持;数据连接也是持久的。( )
A. 对
B. 错