Table 2 The two-dimensional confusion matrices that define the main factors considered in IDS performance evaluation when predicting the anomaly and normal classes
From: Intrusion detection systems for IoT-based smart environments: a survey
| Predicting the anomaly class | |||
| Attack | Normal | ||
| Actual | Attack | α A | β A |
| Class | Normal | γ A | δ A |
| Predicting the normal class | |||
| Normal | Attack | ||
| Actual | Normal | α N | β N |
| Class | Attack | γ N | δ N |