350-501 Services Practice Question
Which THREE of the following are correct statements about EVPN-VXLAN in a data center fabric? (Select three.)
⚠ Common exam trap
Cisco often tests the misconception that VXLAN is a Layer 3 overlay or that it always requires multicast in the underlay, when in fact VXLAN is a Layer 2 overlay and can use head-end replication as an alternative to multicast.
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
✓
EVPN route type 3 is used for BUM traffic forwarding.
EVPN route type 3 (Inclusive Multicast Ethernet Tag Route) is used to advertise the VTEP addresses that participate in a given broadcast domain (EVI). This enables the underlay to forward BUM (Broadcast, Unknown unicast, Multicast) traffic by building a head-end replication list or by signaling multicast group membership, ensuring that BUM frames are delivered to all remote VTEPs in the same VXLAN segment.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
EVPN route type 3 is used for BUM traffic forwarding.
Why this is correct
Route type 3 is the inclusive multicast route.
- ✓
VXLAN encapsulation adds a 50-byte outer header (14 Ethernet + 20 IP + 8 UDP + 8 VXLAN).
Why this is correct
VXLAN adds 50 bytes (or 54 if VLAN tag considered).
- ✓
EVPN route type 2 is used to advertise MAC and IP addresses.
Why this is correct
Route type 2 carries MAC and IP binding.
- ✗
VXLAN is a Layer 3 overlay that requires an IGP in the overlay.
Why it's wrong here
VXLAN is a Layer 2 overlay; no IGP in overlay.
- ✗
VXLAN always requires IP multicast in the underlay for BUM traffic.
Why it's wrong here
BUM can be handled by ingress replication or multicast.
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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.