212-89 Network Incidents Practice Question
An incident responder is using NetFlow to identify a data exfiltration event. What specific field in a NetFlow v9 record provides the best indication of the total volume of data moved between two internal hosts?
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
✓
IN_BYTES
The 'BYTES' or 'IN_BYTES' field in NetFlow records tracks the total octets transferred during the flow, critical for identifying large data transfers.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
PROTOCOL
Why it's wrong here
This field indicates the Layer 4 protocol used.
- ✗
IPV4_SRC_ADDR
Why it's wrong here
This field indicates the source address, not the volume.
- ✓
IN_BYTES
Why this is correct
IN_BYTES accurately reports the volume of data in the captured flow.
- ✗
LAST_SWITCHED
Why it's wrong here
This indicates timing, not data volume.
About these practice questions
This 212-89 question is part of Courseiva's 206-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. 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.