为了帮助您将这些技术与刚才提到的攻击类别联系起来，我们将使用以下图形解释各种技术。
To help you tie these techniques back to the classes of attack just presented, for each technique we will include the following graphic.
算法采用有向图来表示攻击类别及其逻辑关系，按照前向匹配和缺项匹配的方式对报警进行关联。
In this algorithm, an extended directed graph is used to show attack types and their relations, while the correlation is performed according to the method of forwards matching and absent matching.
例如，如果这个消息类别是有关安全性方面的，那么如果检测到字典攻击，就应该产生一条警告消息。
For example, if the message category is related to security, a warning message should be produced if a dictionary attack is detected.
下面列出了四种主要类别中的特定攻击类型。
Specific types of attacks within the four broad categories are listed below.
类别：拒绝服务攻击。
范例中会使用CNG类别、具名管道传输和互动式主控台视窗，示范拦截式攻击的安全性方案。
The example USES CNG classes, a named pipes transport, and interactive console Windows to demonstrate security solutions for a man-in-the-middle attack.
范例中会使用CNG类别、具名管道传输和互动式主控台视窗，示范拦截式攻击的安全性方案。
The example USES CNG classes, a named pipes transport, and interactive console Windows to demonstrate security solutions for a man-in-the-middle attack.
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