Implementing and Operating Cisco Security Core Technologies (SCOR) — Question 338

What is a difference between a DoS attack and DDos attack?

Answer options

• A. A DoS attack is where a computer is used to flood a server with TCP packets, whereas DDoS attack is where a computer is used to flood a server with UDP packets.
• B. A DoS attack is where a computer is used to flood a server with UDP packets, whereas DDoS attack is where a computer is used to flood a server with TCP packets.
• C. A DoS attack is where a computer is used to flood a server with TCP and UDP packets, whereas DDoS attack is where a computer is used to flood multiple servers that are distributed over a LAN.
• D. A DoS attack is where a computer is used to flood a server with TCP and UDP packets, whereas DDoS attack is where multiple systems target a single system with a DoS attack.

Correct answer: D

Explanation

The correct answer is D because a DoS attack typically originates from one source and targets one server, while a DDoS attack involves multiple systems working together to overwhelm a single target. Options A, B, and C incorrectly describe the nature of the attacks or mix up the definitions of TCP and UDP usage.