A network engineer is troubleshooting a VXLAN overlay and notices that the underlay MTU is set to 1500 bytes. What is the most likely issue?

The VTEP will fragment the packets, causing performance issues.

The overlay cannot be established because the MTU is too small.

Large VXLAN packets are being dropped because of the additional encapsulation overhead.

The VXLAN control plane will not function with an MTU of 1500.

A network engineer is configuring a GRE tunnel between two routers to carry IPv6 traffic over an IPv4-only network. What is a key characteristic of GRE that makes it suitable for this task?

GRE can encapsulate a wide variety of protocols, including IPv6, inside IPv4.

GRE uses UDP port 4789 for encapsulation.

GRE provides built-in encryption for secure transport.

GRE automatically discovers remote tunnel endpoints.

A packet arrives at a VTEP destined for a VM in a different rack. The VTEP looks up the destination MAC in its forwarding table and finds an entry that points to a remote VTEP. What does the local VTEP do next?

Send the frame directly to the destination VM using the underlay routing table.

Drop the frame because the destination is not on the local segment.

Decapsulate the frame and forward it as a normal Ethernet frame on the local segment.

Encapsulate the frame with a VXLAN header, UDP header, and outer IP header, then forward it toward the remote VTEP.

A network architect is explaining to a customer the difference between the underlay and overlay in a data center fabric. The customer asks: 'If I change the IP addressing scheme of the physical network, what impact does that have on the overlay?' Which response is accurate?

Only the overlay control plane needs to be updated, not the data plane.

The overlay must be reconfigured if the underlay IP addresses of VTEPs change.

The overlay is completely independent and requires no changes.

The overlay will automatically adapt using dynamic routing.

Juniper NetworksCertified Associate, Cloud

Domain 3Objective 2

Underlay and Overlay Networks JN0-214 Practice Questions (Page 2)

Part of the Network Virtualization domain, which makes up ~10% of our current practice bank. Juniper Networks does not publish an official question count, but from its 90-minute exam (~35–60 total, ~4–6 in this domain), expect 1–2 from this objective — we provide 20 practice questions to prepare you well beyond it. (estimate)

20questions here

4free pages

6concepts

Questions 6–10

6foundation · easy
Which tunneling mechanism is commonly used in overlay networks to provide Layer 2 connectivity over a Layer 3 underlay?
Select an answer first
7application · medium
A network engineer is troubleshooting a VXLAN overlay and notices that the underlay MTU is set to 1500 bytes. What is the most likely issue?
Select an answer first
8application · medium
A network engineer is configuring a GRE tunnel between two routers to carry IPv6 traffic over an IPv4-only network. What is a key characteristic of GRE that makes it suitable for this task?
Select an answer first
9application · medium
A packet arrives at a VTEP destined for a VM in a different rack. The VTEP looks up the destination MAC in its forwarding table and finds an entry that points to a remote VTEP. What does the local VTEP do next?
Select an answer first
10application · medium
A network architect is explaining to a customer the difference between the underlay and overlay in a data center fabric. The customer asks: 'If I change the IP addressing scheme of the physical network, what impact does that have on the overlay?' Which response is accurate?
Select an answer first

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