ISC2 CC Network Security Practice Question
A network administrator is troubleshooting connectivity issues and notices that frames are being dropped due to excessive collisions. Which OSI layer is most directly associated with this issue?
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
✓
Data Link
Collisions occur at the Data Link layer (Layer 2) where frames are transmitted over shared media. Hubs and CSMA/CD operate at this layer.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Physical
Why it's wrong here
Physical layer deals with bits and signaling, not collisions directly.
- ✓
Data Link
Why this is correct
Frames and collision detection (CSMA/CD) are Layer 2 functions.
- ✗
Network
Why it's wrong here
Network layer handles routing and IP addressing.
- ✗
Transport
Why it's wrong here
Transport layer manages end-to-end connections.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CC practice question is part of Courseiva's free ISC2 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 CC exam.