Table 1.

The distribution of the training and testing sets from the six datasets generated from KDD’99 and NSL-KDD.

Dataset	Training Dataset					Testing Dataset
	Normal%	DoS%	Probe%	U2R%	R2L%	Normal%	DoS%	Probe%	U2R%	R2L%
Dataset 1	17.96	72.28	7.583	0.096	2.079	19.48	73.90	1.339	0.073	5.205
Dataset 2	19.48	78.40	1.645	0.021	0.451	19.48	73.90	1.339	0.073	5.205
Dataset 3	19.69	79.23	0.831	0.011	0.228	19.48	73.90	1.339	0.073	5.205
Dataset 4	53.38	36.65	9.086	0.044	0.860	43.07	33.08	10.73	0.887	12.21
Dataset 5	48.56	33.11	16.81	0.075	1.435	43.07	33.08	10.73	0.887	12.21
Dataset 6	53.38	36.65	9.086	0.044	0.830	18.16	36.64	20.27	1.688	23.24