212-89 Malware Incidents Practice Question
A system has been infected by a worm that is spreading across the network. What is the most immediate action to stop the spread?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Block propagation ports at the network level
Isolating the affected segments or blocking the ports used for the worm's propagation (e.g., SMB/445) is essential to stop lateral movement.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Update the BIOS on all machines
Why it's wrong here
This is irrelevant to active worm propagation.
- ✓
Block propagation ports at the network level
Why this is correct
Blocking the ports used by the worm prevents it from reaching new hosts.
- ✗
Disable the internet gateway
Why it's wrong here
This stops external traffic but does not stop lateral movement inside the network.
- ✗
Email all users to reboot
Why it's wrong here
Rebooting will not stop a self-propagating worm.
About these practice questions
One of 206 original 212-89 practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official EC-Council exam blueprint
This 212-89 practice question is part of Courseiva's free EC-Council certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 212-89 exam.