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A DDoS works by making a system running out of a scarce resource. What happens then depends on the resource that is exhausted. For instance, the resource may be CPU. The attackers send many requests, and the server must spend some CPU resources to respond to these requests. When the load augments, the server begins to respond slower, then becomes sluggish, ...


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Answer (like a lot of answers in info sec): It depends. If the DDoS attack is swamping the network infrastructure, it may be difficult for an outbound packet to make it through (even with higher priority) because the network switches and appliances might be too busy to process it. On top of this, if it is a TCP connection then it'll need the reply packets ...


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What would happen if the attacker sends the data at the same bandwitch, but keeping up to your size limit? What's the difference between sending 100 100MB files, and sending 10000 1MB files? If you want to be immune to DDOS attack, than you can forget - you can't. Event the biggest giants are affected by such attacks from time to time. Even the biggest ...


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Your code is good for monitoring users activity on the server but to be honest, It can't help preventing DDOS attacks since the aim of DDOS attacks is to send tons of requests to the server to make it too busy to respond to its intended users. your code seems to be doing lots of checking to determine if the number of requests has reached beyond your ...


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According to Wikipedia TCP and UDP flood. The list of attacks is too long to name all of them. I think it will be good exercises for you to do it alone. It's easy for example TCP flood will operate on layer 4 because UDP is operating on this layer(Transport layer).



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