听力原文:W: Excuse me. Do you know how this works?
M: Yes. Put the washing inside, shut the door, the money goes in here. Then when the machine starts you have to put the soap powder in through here.
W: Is that all?
M: Yes.
W: But is there anything I should do when it works?
M: You don't have to do anything else until the machine stops.
W: Thank you so much.
(8)
A.The woman is willing to do the washing for the man.
B.The man wants the woman to do the washing for him.
C.The woman knows little about the machine.
D.The man knows nothing about the machine.
第4题
A.它会导致在路由器上的资源过载
B.它可以导致将太多地址分配给相同的接口。
C.它可以禁用过载命令。
D.它阻止了内部网络中IP地址的正确翻译
第6题
A.地址转换可以是内部网络用户(私有IP地址)方便访问Internet
B.地址转换可以使内部局域网的许多主机共享一个IP地址上网
C.地址转换能够处理IP报头加密的情况
D.地址转换可以屏蔽内部网络的用户,提高内部网络的安全性
第7题
A.防火墙是设置在可信任网络和不可信任网络之间的一道屏障
B.防火墙可以清除病毒
C.任何可信任网络的用户都可以对外部网络自由访问
D.防火墙不能防范来自于网络内部的攻击
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