Correct Answer : Cyber security
A Distributed Denial of Service (DDoS) attack is an attempt to make an online service unavailable by overwhelming it with traffic from multiple sources.
A massive DDoS attack affected the websites of over 200 organisations across Belgium, including government, parliament, universities and research institutes. The DDoS attack started on 4 May and targeted Belnet, the government-funded ISP provider for the county’s educational institutions and government services.