Understanding DDoS Attack คือ: Denial of Service Attacks Quiz and Flashcards

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Questions and Answers

What is the primary purpose of a Denial of Service (DoS) attack?

To modify internal data and change programs

To gain unauthorized access to a system

To eavesdrop on network traffic

To shut down a site or service, not penetrate it (correct)

What is the difference between a DoS attack and a DDoS attack?

A DoS attack aims to penetrate the system, while a DDoS attack aims to shut it down

A DoS attack is more common than a DDoS attack

A DoS attack involves a single host, while a DDoS attack involves multiple hosts attacking simultaneously (correct)

There is no difference between a DoS and a DDoS attack

What was the significance of the Morris Worm incident in 1988?

It was the first successful DDoS attack to cripple large amounts of network infrastructure

It was a penetration attack that gained unauthorized access to systems

It exploited software commonality (monoculture) and vulnerabilities in fingerd and sendmail (correct)

It was the first known computer virus

Which of the following is NOT a type of DoS attack mentioned in the text?

Ransomware Signup and view all the answers

What is the purpose of a Man-in-the-Middle attack in the context of DoS attacks?

To listen to network traffic and control the output Signup and view all the answers

Which of the following statements about the Morris Worm is NOT true?

It was the first known computer virus Signup and view all the answers

What was the primary motivation behind the first DDoS attack that crippled large amounts of network infrastructure?

Self-replication and propagation Signup and view all the answers

Which vulnerability did the Morris Worm exploit to propagate itself?

Both fingerd buffer overflow and sendmail root vulnerability Signup and view all the answers

What was the estimated cost of cleaning up the Morris Worm incident in 1988?

The text does not mention the cost Signup and view all the answers

Which of the following is NOT a potential purpose of a Denial of Service (DoS) attack mentioned in the text?

Data exfiltration Signup and view all the answers

What is the primary difference between a DoS attack and a DDoS attack?

DDoS attacks involve multiple hosts attacking simultaneously, while DoS attacks involve a single host Signup and view all the answers

Which of the following is NOT a type of DoS attack mentioned in the text?

SQL injection attack Signup and view all the answers

What is the primary purpose of a penetration attack in the context of DoS attacks?

To take over the victim's machine and control it Signup and view all the answers

What is the purpose of a Man-in-the-Middle attack in the context of DoS attacks?

To substitute messages in both directions between the victim and the network Signup and view all the answers

Which of the following statements about the Morris Worm is true?

It exploited software commonality (monoculture) Signup and view all the answers

Study Notes

DoS and DDoS Attacks

A DoS (Denial of Service) attack is a malicious attempt to cause a victim, site, or node to deny service to its client.
A DDoS (Distributed Denial of Service) attack occurs when multiple hosts attack simultaneously.
The purpose of DoS attacks is to shut down a site, not to penetrate it.
Motivations for DoS attacks include vandalism, extortion, and social action (including terrorism).

History of Morris Worm

The first DDoS attack occurred on November 2, 1988, and was carried out by the Morris Worm.
The worm was self-replicating and self-propagating, and exploited software commonality (monoculture).
It used a fingerd buffer overflow exploit and Sendmail root vulnerability, and was facilitated by weak passwords.
The attack infected 10% of internet computers (around 6,000) and cost millions to clean up.

Types of DoS Attacks

Penetration Attacks: allow an attacker to gain control of a machine and do whatever they want.
Eavesdropping Attacks: allow an attacker to gain access to a network and listen to traffic going in and out of a machine.
Man-in-the-Middle Attacks: allow an attacker to listen to output and control output, and can substitute messages in both directions.
Flooding Attacks: a type of DoS attack that involves flooding a system with traffic in order to overwhelm it.

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Description

Learn about DoS (Denial-of-Service) and DDoS (Distributed Denial-of-Service) attacks, which are malicious attempts to disrupt or deny services to clients. Understand the differences between the two types of attacks, their purposes, and common motivations behind them.