比这更糟糕的是，这样的系统很多都没有经过优化，容易受到部分或全面故障和外部攻击的威胁。
Worse than this, many such systems are not optimized and are vulnerable to the threats of partial or complete failure and external attacks.
如何保护校园网不受内部或外部的安全威胁，保证校园网的正常运行便成了重中之重。
How to protect the campus network from internal or external security threats, the campus network to the normal operation became top priority.
如何保护校园网不受内部或外部的安全威胁，保证校园网的正常运行便成了重中之重。
How to protect the campus network from internal or external security threats, the campus network to the normal operation became top priority.
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