【单选题】【消耗次数：1】
下列关于防火墙叙述，错误的说法是____。
①
防火墙是硬件设备
②
防火墙将企业内部网与其他网络隔开
③
防火墙禁止非法数据进入
④
防火墙增强了网络系统的安全性
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相关题目
【多选题】
关于防火墙，叙述正确的是（）
①
A、防火墙可通过屏蔽未授权的网络访问等手段把内部网络隔离为可信任网络
②
防火墙的安全性能是可根据系统安全的要求而设置，因系统的安全级别不同而有所不同
③
防火墙可以有效的查杀病毒，对网络攻击可进行检测和告警
④
防火墙可以用来把内部可信任网络对外部网络或其他非可信任网络的访问限制在规定的范围之内
【单选题】
下列关于防火墙的叙述不正确的是（ ）__
①
既有软件防火墙，也有硬件防火墙
②
防火墙既可以防范外部入侵，也可以防止内部攻击
③
防火墙可以增强网络系统的安全性
④
防火墙通常安装于网络与网络之间
随机题目
【单选题】
You must have stayed up late last night, _____?
①
mustn’ t you
②
don’ t you
③
didn’ t you
④
needn’ t you
【单选题】
Mr. Milton prefers to resign ____ part in such dishonest business deals.
①
than take
②
than to take
③
rather than take
④
rather than to take
【单选题】
If your new coat is too large, a tailor can____ it to fit you.
①
alter
②
transform
③
vary
④
change
【单选题】
Many automobile accidents were ____ careless driving.
①
attributed to
②
resulted in
③
contributed to
④
raised from
【单选题】
To obtain a satisfactory result, one must apply
two ____ of paint on a clean surface.
①
coats
②
levels
③
times
④
courses
【单选题】
No one would have time to read or listen to an account of everything ____going on in the world.
①
it is
②
as is
③
there is
④
what is
【单选题】
They have done things they ought_____.
①
not to do
②
not to be done
③
not to have done
④
not having done
【单选题】
____ native to North America, corn has now spread all over the world.
①
In spite of
②
That it is
③
It was
④
Although
【单选题】
Bit by bit, a child makes the necessary changes to make his language ____.
①
as other people
②
as other people’s
③
like other people
④
like other people’s