Windows 95, Windows 98, Windows 2000, Windows NT 4.0, and Terminal Server systems allow a remote attacker to cause a denial of service by sending a large number of identical fragmented IP packets, aka jolt2 or the "IP Fragment Reassembly" vulnerability.
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2000/ms00-029
http://www.securityfocus.com/templates/advisory.html?id=2240