350-601 Network Practice Question
In a VXLAN EVPN fabric, BUM traffic can be handled by ingress replication or multicast. Which statement about ingress replication is accurate?
⚠ Common exam trap
Cisco often tests the misconception that ingress replication requires an underlay multicast protocol like PIM or IGMP, when in fact it is a unicast-based replication method that avoids any multicast dependency in the underlay.
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
✓
The ingress VTEP replicates the BUM packet and sends unicast copies to each remote VTEP.
In ingress replication, the ingress VTEP (VXLAN Tunnel Endpoint) receives a BUM (Broadcast, Unknown unicast, Multicast) packet and creates multiple unicast-encapsulated copies, sending one copy to each remote VTEP in the same VXLAN network identifier (VNI) segment. This method does not rely on any multicast protocol in the underlay; instead, it leverages the VTEP's knowledge of all remote VTEPs (typically learned via the EVPN control plane, such as Type 3 Inclusive Multicast Ethernet Tag routes) to replicate traffic. Option B correctly describes this behavior.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
It requires PIM in the underlay to replicate packets.
Why it's wrong here
PIM is needed for multicast-based replication.
- ✓
The ingress VTEP replicates the BUM packet and sends unicast copies to each remote VTEP.
Why this is correct
Correct: ingress replication creates unicast copies.
- ✗
It reduces replication overhead on the ingress VTEP compared to multicast.
Why it's wrong here
Ingress replication can be more CPU-intensive.
- ✗
It uses IGMP snooping to optimize replication.
Why it's wrong here
IGMP snooping is for multicast optimization.
Go deeper
Related to this question
About these practice questions
Courseiva writes every 350-601 question from scratch — 984 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 350-601 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 350-601 exam.