要在一个接口上配置 IP地址和子网掩码，正确的命令是哪个（）
A. Switch（config）#ip address 192.168.1.1
B. Switch （config-if ）#ip address 192.168.1.1
C. Switch （config-if ）#ip address 192.168.1.1 255.255.255.0
D. Switch（config-if ）#ip address 192.168.1.1 netmask 255.255.255
以下为标准访问列表选项是（）
A. access-list 116 permit host 2.2.1.1
B. access-list 1 permit 172.168.10.198 255.255.0.0
C. access-list 1 deny 172.168.10.198
D. access-list standard 1.1.1
Which of the following statement about controlling nervousness is incorrect（）
A. Establishing a right perception of yourself
B. Acquiring more speaking experiences
C. Making enough preparations
D. Staying up late before you give a speech
In the past, people could communicate only with___（）
A. Paper mails
B. Wired telephone
C. Radio programs
D. TV programs
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