olemus
(a) meetmed kaitseks ummistusrünnete eest
(b) "anti-DoS" võib olla ka vastavate tootenimede osa

ülevaateid
https://www.byos.io/blog/denial-of-service-attack-prevention
http://help.fortinet.com/fos50hlp/52data/Content/FortiOS/fortigate-firewall-52/Security%20Policies/DoS%20Protection.htm
https://cheatsheetseries.owasp.org/cheatsheets/Denial_of_Service_Cheat_Sheet.html