350-601 Network Practice Question
In VXLAN, which method of handling BUM traffic replicates packets to remote VTEPs only when there is a known receiver behind that VTEP?
⚠ Common exam trap
Cisco often tests the distinction between 'ingress replication' and 'multicast-based replication' by making candidates think multicast is always more efficient, but the trap here is that multicast-based replication sends BUM to all VTEPs in the multicast group regardless of receiver presence, whereas ingress replication only sends to VTEPs with known receivers, making it more efficient in many scenarios.
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
✓
Ingress replication
Ingress replication is the correct method because in VXLAN, the ingress VTEP replicates BUM (Broadcast, Unknown unicast, Multicast) traffic and sends a copy to each remote VTEP only if that VTEP has at least one receiver (i.e., a host or VM) that has joined the relevant multicast group or is reachable via the VNI. This avoids unnecessary replication to VTEPs with no interested receivers, optimizing bandwidth and reducing load on the underlay network.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Ingress replication
Why this is correct
The ingress VTEP replicates packets to each remote VTEP with known receivers.
- ✗
Egress replication
Why it's wrong here
Not a standard VXLAN term.
- ✗
Multicast-based replication
Why it's wrong here
Uses underlay multicast groups to distribute BUM traffic.
- ✗
Head-end replication
Why it's wrong here
Similar to ingress replication but often used in MPLS; VXLAN uses ingress replication.
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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.