Context: Denial of service attacks are designed to make a machine or network resource unavailable to its intended users. Attackers can deny service to individual victims, such as by deliberately entering a wrong password enough consecutive times to cause the victim account to be locked, or they may overload the capabilities of a machine or network and block all users at once. While a network attack from a single IP address can be blocked by adding a new firewall rule, many forms of Distributed denial of service (DDoS) attacks are possible, where the attack comes from a large number of points – and defending is much more difficult. Such attacks can originate from the zombie computers of a botnet, but a range of other techniques are possible including reflection and amplification attacks, where innocent systems are fooled into sending traffic to the victim.

Question: What are attacks designed to make a machine or network unavailable to its intended users?
Answer: Denial of service attacks

Question: What does deliberately entering the wrong password enough consecutive times cause?
Answer: the victim account to be locked

Question: What are attacks where innocent systems are fooled into sending traffic to the victom called?
Answer: reflection and amplification attacks

Question: What does DDoS stand for?
Answer: Distributed denial of service

Question: How can a network attack from a single IP address be blocked?
Answer: by adding a new firewall rule

Question: What happens if an attacker enters the wrong password into an account enough times?
Answer: Unanswerable

Question: What is the point of making network resources unavailable to users?
Answer: Unanswerable

Question: Why is it difficult to defend against DDos?
Answer: Unanswerable

Question: Other than being locked out what other methods are used in DDos?
Answer: Unanswerable

Question: What causes multiple attacks?
Answer: Unanswerable

Question: What allows a machine to be accessed by its user?
Answer: Unanswerable

Question: What is done to a password to lock out all users at once?
Answer: Unanswerable

Question: How is a DDoS from multiple locations defended?
Answer: Unanswerable

Question: What is an IP address?
Answer: Unanswerable

Question: What are zombie computers on a botnet?
Answer: Unanswerable