Hello everyone my name is vijay kumar Devireddy and I am glad to have you back on my episode 72 today we're going to discuss about In the last lesson we discussed the concept of a denial of service attack,and we went over all of the different types of them, but most modern systems can't be taken down by a single machine attempting a denial of service anymore,so attackers got smarter and they created a distributed denial of service, or DDoS.Now a distributed denial of service attack,instead of using a single attack targeting one server they use hundreds or even thousands of machines to launch an attack simultaneously against a single server,and force it offline to create that denial of service condition.Usually these machines that conduct the attack don't even realize that they're a part of it though.Generally these machines have become zombies or bots inside a large bot net and then when they receive that command to attack,they all simultaneously send all their payloadsagainst a single victim.Now, in addition to most basic forms of DDoS attacks,there is one specific type of DDoS attack called a DNS amplification attack that could be performed.This specialized DDoS allows an attacker to generate a high volume of packets that's intended to flood a victim's website by initiating DNS requests from a spoof version of the target's IP address.This causes the DNS servers to respond to that request and send the response back to the server thinking that it's valid, because a DNS request uses very little bandwidth to send,but the response usually takes up a lot more bandwidth,this allows the attack to be amplified against the victim's server.Also if this is happening because thousands of simultaneous requests are being made by a bunch of zombies and a bot net on behalf of your victim's server,you can easily become overwhelmed with a lot of information and eat up lots of bandwidth pretty quickly causing that denial of service condition to occur.