【判断题】【消耗次数：1】
包过滤防火墙主要是对进出防火墙的数据包进行过滤。
①
正确
②
错误
参考答案：
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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
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①
Although
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Even although
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However
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Because
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Seeing
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To be seen
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Seen
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Having seen
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that what the difference
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what the difference is
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the difference is what
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didn’t do
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don’t do
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will not do
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fills
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takes in
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mixes
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①
first of all
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above all
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after all
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Only by shouting at the top of his voice ____.
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he was able to make himself hear
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he was able to make himself heard
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was he able to make himself heard
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was he able to make himself hear
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①
forget
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remind
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remember
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realize
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①
think
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to think
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having thought
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thinking