题目内容
（请给出正确答案）
[主观题]
Which of the following is true？ A．No firewall contains serious exploitable bugs. B．Your computer c
Which of the following is true？
A．No firewall contains serious exploitable bugs.
B．Your computer can't work without a firewall.
C．Direct Internet connections provide hackers with an easy way of invasion.
D．Firewalls need no configuration.
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