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单选题

如果用户想查看系统中是否安装了某个软件,则输入的命令是( )。

A
rpm –aq
B
rpm –ed
C
rpm –ui
D
rpm -qi

题目答案

A

答案解析

暂无解析
举一反三
单选题

某用户创建了一个名为file1的文本文档,为了安全起见,允许文件的所有者具备读写权限,其他用户只能进行只读访问,则可以使用的命令是( )。

A
chmod 644 file1
B
chown 644 file1
C
chmod 622 file1
D
chown 622 file1

题目答案

A

答案解析

暂无解析
单选题

为确定接口的操作状态,要使用哪个命令()

A
displsy interface status
B
show interface
C
show status interface
D
display interface

题目答案

B

答案解析

暂无解析
单选题

A Ezonexam Ethernet switch receives a unicast frame. with a destination MAC that is listed in the switch table. What will this switch do with the frame?

A
The switch will forward the frame. to a specific port
B
The switch will forward the frame. to all ports except the port on which it was received
C
The switch will return a copy of the frame. out the source port
D
The switch will not forward unicast frames
E
The switch will remove the destination MAC from the switch table
F
None of the above.

题目答案

A

答案解析

解析:EXPLANATION:HOW DOES THE SWITCH FIND HOST MACS?LET'S USE THE DIAGRAM BELOW TO HELP US UNDERSTAND HOW ADDRESS LEARNING PROCESS TAKES PLACE.LET'S ASSUME THAT WE HAVE JUST POWERED ON THE SWITCH. IT HAS NOTHING IN ITS MAC TABLE. WE CONNECT THE CABLES
单选题

当UTRAN使用pagingtype1和pagingtype2的时候,cn侧下发的paging消息有什么区别?()

A
PS域和CS域使用不同的方式
B
用户ASC不同
C
寻呼原因不同
D
没有区别

题目答案

D

答案解析

暂无解析