Suggest an editImprove this articleRefine the answer for “What are flooding attacks?”. Your changes go to moderation before they’re published.Approval requiredContentWhat you’re changing🇺🇸EN🇺🇦UAPreviewTitle (EN)Short answer (EN)**Flooding attacks** are a type of network attack in which the attacker floods a system with a huge number of requests to overload it and make it unavailable. **Key point:** a flooding attack violates only availability - data is not stolen or altered, the service simply stops working.Shown above the full answer for quick recall.Answer (EN)Image**Flooding attacks** are a type of network attack in which the attacker **floods a system with a huge number of requests** to **overload it and make it unavailable**. In simple terms: *the server receives so many requests that it "chokes" and stops working normally.* --- ## The essence of flooding attacks Every system has limited resources: - CPU, - memory, - network bandwidth, - the number of simultaneous connections. A flooding attack **exhausts these resources**, even if the requests formally look correct. The goal is almost always the same - **to break the availability of the service**. --- ## What flooding attacks belong to Flooding is the basis for: - **DoS** (attack from a single source), - **DDoS** (attack from many sources). --- ## Main types of flooding attacks ### 1. SYN Flood **How it works:** - the attacker sends many TCP connection requests; - the connection is never completed; - the server keeps "half-open" connections. As a result, the server cannot accept new connections. --- ### 2. UDP Flood **How it works:** - a huge number of UDP packets are sent; - the server tries to process or respond to them. This very quickly overloads the channel and the CPU. --- ### 3. ICMP Flood (Ping Flood) **How it works:** - the server is flooded with ICMP requests (ping); - it spends resources on replies. Often used to overload the network. --- ### 4. HTTP Flood **How it works:** - the server receives many HTTP requests; - the requests look like ordinary user requests. Dangerous because it is **hard to distinguish from legitimate traffic**. --- ## What a flooding attack violates - **Availability**, from the CIA triad. Data is not stolen or altered - the service simply stops working. --- ## How to defend against flooding attacks ### Main defense measures: - limiting the number of requests (rate limiting); - firewall and traffic filtering; - IDS/IPS; - anti-DDoS services; - load balancing.For the reviewerNote to the moderator (optional)Visible only to the moderator. Helps review go faster.