OverviewStart here2 min
Denial-of-Service
Overload a service so real users cannot reach it.
About this module
A Denial-of-Service attack doesn't steal data — it makes a service unavailable, attacking the "A" in the CIA triad. This module covers how floods are built (botnets), the three attack families, the classic techniques, and — defense-first — how organizations detect and absorb them. The lab only watches a flood against your own VM, so nothing leaves your lab network.
What you will learn
- DoS vs DDoS, and botnets
- The three attack categories
- Volumetric and protocol attacks (SYN flood)
- Application-layer (L7) attacks
- Amplification & reflection (DRDoS)
- Detection, countermeasures and protection services
Module roadmap
01DoS vs DDoS BasicsLesson 1 · ~5 min
02Attack CategoriesLesson 2 · ~4 min
03Volumetric AttacksLesson 3 · ~4 min
04Protocol Attacks: SYN FloodLesson 4 · ~5 min
05Application-Layer (L7) AttacksLesson 5 · ~4 min
06Amplification & Reflection (DRDoS)Lesson 6 · ~5 min
07Classic & Multi-Vector AttacksLesson 7 · ~4 min
08Detection & CountermeasuresLesson 8 · ~4 min
09Lab: Watch a SYN FloodLab · ~35 min
10AssessmentAssessment · ~5 min
How to study: read a lesson → answer its 2 "Check yourself" questions → do the lab → pass the assessment with 80%+. Lessons 1, 2, 4 and 6 are the most tested.