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()is not a physical wall, but a lot of virtual data to protect the computer network.

单选题
2021-12-23 23:43
A、Data wall
B、Data Channel
C、Data base
D、firewall
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正确答案
D

试题解析
中文:防火墙不是一个实际的墙,它是利用一些虚拟的数据来保护电脑。

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