350-501 Architecture Practice Question
What is the primary function of the aggregation layer in a service provider network?
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
✓
Aggregate traffic from the access layer and forward to the core
The aggregation layer collects traffic from access nodes and forwards it to the core, often performing QoS, filtering, and subscriber management.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Provide direct customer connections
Why it's wrong here
This is the access layer.
- ✓
Aggregate traffic from the access layer and forward to the core
Why this is correct
Aggregation layer consolidates access traffic.
- ✗
Perform deep packet inspection
Why it's wrong here
DPI may be done but not primary function.
- ✗
Provide high-speed backbone connectivity
Why it's wrong here
This is the core/backbone.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 350-501 practice question is part of Courseiva's free Cisco 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 350-501 exam.