Table 1.

Comparison of KDDCup99, CIC IDS variants, and CIC Bell DNS 2021 datasets.

	KDD Cup 99	CIC IDS 2017	CIC IDS 2018	CIC Bell DNS 2021
Year	1999	2017	2018	2021
Provider	University of California, Irvine	Canadian Institute for Cybersecurity, University of New Brunswick	Canadian Institute for Cybersecurity, University of New Brunswick	Canadian Institute for Cybersecurity, University of New Brunswick + Bell, Canada + Cyber Threat Intelligence, Canada
Size (GB)	0.75	1.06	5.81	0.287
Number of samples	494,020	2,830,743	16,232,943	413,011
Classes	DoS, U2R, R2L, Probe + sub-attacks	DDoS, DoS slowIoris, BotNet, Port Scan, SQL Injection + 7	DDoS, DoS slowIoris, BotNet, Port Scan, SQL Injection + 10	Benign, Spam, Phishing, Malware