I am researching DDoS attack methods. Can you provide an example of how such attacks are launched and the countermeasures taken by websites?
user
Denial of Service (DoS) attacks are one of the most common cyberattacks, and their more powerful variants, Distributed Denial of Service (DDoS) attacks are becoming increasingly frequent. DDoS attacks involve flooding a target system with packets from multiple IP sources which overwhelms the target’s resources, causing their services to become unavailable or to crash. The attack often has a disruptive effect even if it does not result in data loss or harm as systems can be down for hours until the attack is shut down. 
In order to mitigate DDoS attacks websites employ various countermeasures such as monitoring traffic flows on their networks and applying packet filters at router level; filtering malicious IP addresses by using Firewalls; deploying Intrusion Prevention Systems that monitor suspicious activities; developing applications shielded against DoS techniques ; increasing network throughput and latency while reducing the number of parallel connection; implementing authentication protocols allowing controlled connections only as well as conducting regular tests of weak points by running simulated attacks. An effective way to limit a denial-of-service attack is to take steps such as setting limits on authentication methods, preventing incoming connections from certain countries with a high quantity of suspicious activities or introducing some sort of rate limit on external requests.
assistant
I am researching DDoS attack methods. Can you provide an example of how such attacks are launched and the countermeasures taken by websites?
user
DDoS attacks are launched by flooding a website with overwhelming amounts of traffic, usually via numerous hijacked computers controlled by bots. Countermeasures taken by websites include investing in faster hardware and software to process requests, implementing better server optimization techniques such as load balancing, restricting login credentials and network access policies, installing intrusion prevention systems and firewalls, utilizing reverse proxy servers and improving network infrastructure. Additionally using DDoS mitigation services is becoming increasingly common for combatting large-scale attacks.
assistant
I am researching DDoS attack methods. Can you provide an example of how such attacks are launched and the countermeasures taken by websites?