Denial of Service (DoS/DDoS) in Cybersecurity - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a Denial of Service (DoS) attack?

A Denial of Service (DoS) attack is when someone tries to make a computer, website, or network unavailable by overwhelming it with too much traffic or requests, so real users cannot access it.

beginner

How does a Distributed Denial of Service (DDoS) attack differ from a DoS attack?

A DDoS attack uses many computers or devices at the same time to flood a target with traffic, making it harder to stop than a DoS attack, which usually comes from one source.

beginner

Name one common goal of DoS/DDoS attacks.

One common goal is to disrupt a website or online service so that users cannot access it, causing inconvenience or financial loss.

intermediate

What is a botnet in the context of DDoS attacks?

A botnet is a group of many infected computers or devices controlled by an attacker to send large amounts of traffic during a DDoS attack.

beginner

Give one simple way organizations protect against DoS/DDoS attacks.

Organizations use special tools like firewalls and traffic filters to detect and block suspicious traffic before it reaches their servers.

What does a DoS attack aim to do?

A Make a service unavailable by overwhelming it

B Steal personal information

C Install software updates

D Improve website speed

A DoS attack tries to make a service unavailable by flooding it with too much traffic.

Which of these best describes a DDoS attack?

A Attack from a single computer

B Attack from multiple computers at once

C Attack that steals data

D Attack that fixes bugs

A DDoS attack uses many computers to flood a target simultaneously.

What is a botnet used for in cyber attacks?

A To protect networks

B To send spam emails

C To control many devices for DDoS attacks

D To speed up internet

A botnet is a network of infected devices controlled to launch DDoS attacks.

Which is NOT a typical effect of a DoS attack?

A Data is automatically backed up

B Users cannot access services

C Website becomes slow or unreachable

D Business may lose money

DoS attacks disrupt services; they do not back up data.

How can organizations reduce the impact of DoS attacks?

A By ignoring suspicious traffic

B By increasing prices

C By shutting down their website

D By using firewalls and traffic filters

Firewalls and filters help block harmful traffic during DoS attacks.

Explain what a Denial of Service (DoS) attack is and how it affects online services.

Think about what happens when too many requests hit a website.

Describe the difference between a DoS and a DDoS attack and why DDoS attacks are harder to stop.

Consider how many devices are involved in each attack.