How does VXLAN handle unknown unicast traffic in the data plane?

It floods the packet to all VTEPs in the VNI

It forwards the packet only to the intended destination

It sends the packet to the default gateway

A network engineer is configuring VXLAN between two switches. The underlay MTU is set to 1500 bytes, and the VXLAN overhead is 50 bytes (outer IP/UDP/VXLAN). What must the engineer do to ensure VXLAN packets are not fragmented?

Increase the underlay MTU to at least 1550 bytes on all devices in the path.

Enable fragmentation on the VTEPs.

Reduce the MTU on the access ports to 1400 bytes.

Configure the VXLAN tunnel to use a smaller VNI.

In a multicast-based VXLAN control plane, how do VTEPs learn MAC addresses?

By using BGP to exchange MAC tables

By reading the ARP cache of the underlay routers

By observing multicast traffic and learning source MACs

By sending unicast queries to a central server

A network team is deploying VXLAN with BGP EVPN. They have two VTEPs, VTEP-A and VTEP-B, in the same VNI. VTEP-A learns a MAC address from a local host. How does VTEP-B learn about this MAC address?

VTEP-B receives the MAC address via a multicast packet from VTEP-A.

VTEP-B learns the MAC address by observing the source MAC of VXLAN-encapsulated data traffic from VTEP-A.

VTEP-A advertises the MAC address in an EVPN MAC/IP advertisement route via BGP, and VTEP-B imports it into its forwarding table.

VTEP-B sends an ARP request to VTEP-A to resolve the MAC address.

What is the role of the VNI in VXLAN?

To identify the outer IP source address

To encrypt the encapsulated frame

To segment Layer 2 broadcast domains

To determine the routing protocol used in the underlay

Juniper NetworksCertified Specialist, Mist AI Wired (JNCIS-MistAI)

Domain 5Objective 1

VXLAN Fundamentals JN0-460 Practice Questions (Page 3)

Part of the Campus EVPN-VXLAN domain, which makes up ~11% of our current practice bank. Juniper Networks does not publish an official question count, but from its 90-minute exam (~35–60 total, ~4–7 in this domain), expect 1–2 from this objective — we provide 32 practice questions to prepare you well beyond it. (estimate)

32questions here

7free pages

8concepts

Questions 11–15

11foundation · easy
How does VXLAN handle unknown unicast traffic in the data plane?
Select an answer first
12application · medium
A network engineer is configuring VXLAN between two switches. The underlay MTU is set to 1500 bytes, and the VXLAN overhead is 50 bytes (outer IP/UDP/VXLAN). What must the engineer do to ensure VXLAN packets are not fragmented?
Select an answer first
13foundation · easy
In a multicast-based VXLAN control plane, how do VTEPs learn MAC addresses?
Select an answer first
14expert · medium
A network team is deploying VXLAN with BGP EVPN. They have two VTEPs, VTEP-A and VTEP-B, in the same VNI. VTEP-A learns a MAC address from a local host. How does VTEP-B learn about this MAC address?
Select an answer first
15foundation · easy
What is the role of the VNI in VXLAN?
Select an answer first

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