350-501 MPLS and Segment Routing Practice Question
In EVPN multi-homing, which two mechanisms are used to avoid duplicate packets and ensure efficient forwarding? (Choose two.)
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
✓
Split-horizon filtering
Designated Forwarder (DF) election ensures only one PE forwards traffic to the CE for broadcast/multicast/unknown unicast, and split-horizon prevents a PE from forwarding packets back to the ES from which they were received.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
MAC mobility
Why it's wrong here
MAC mobility handles MAC moves, not duplication.
- ✓
Split-horizon filtering
Why this is correct
Correct: Split-horizon prevents loops.
- ✗
Aliasing
Why it's wrong here
Aliasing allows load balancing but does not prevent duplicates.
- ✗
ARP suppression
Why it's wrong here
ARP suppression reduces ARP broadcasts but not duplication.
- ✓
Designated Forwarder (DF) election
Why this is correct
Correct: DF election prevents duplicate traffic to CE.
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JA
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.