Towards Effective Network Intrusion Detection: A Hybrid Model Integrating Gini Index and GBDT with PSO

Table 2

Number of instances in NSL-KDD.

	Normal	DoS	Probe	U2R	R2L	Total
Training set	67,343	45,927	11,656	52	995	125,973
Testing set	9711	7458	2421	200	2754	22,544