A company wants to connect two data centers to provide a single Layer 2 domain for a legacy application, but the WAN between them is a routed IP network. They also want to keep the configuration on the physical WAN routers unchanged. What approach should they use?

Replace the WAN routers with Layer 2 switches.

Use MPLS L3VPN to connect the sites.

Extend VLANs across the WAN using 802.1Q trunking.

Deploy VXLAN tunnels between VTEPs at each data center.

A VTEP receives a VXLAN packet from the underlay. What is the first step the VTEP performs to process the packet?

Forward the packet based on the outer destination MAC address.

Send the packet to the local CPU for routing decisions.

Look up the VNI in the forwarding table to determine the destination tenant.

Decapsulate the packet by removing the outer Ethernet, IP, and UDP headers.

Which statement correctly contrasts the underlay and overlay networks?

The overlay is responsible for physical routing, while the underlay handles virtual switching.

The underlay is more scalable than the overlay.

The underlay is used only in small networks, while the overlay is used only in large networks.

The underlay provides physical connectivity, while the overlay provides logical virtual topologies.

What is the basic operation of a GRE tunnel in an overlay network?

It replaces the original packet's IP header with a new one.

It encapsulates the original packet with a GRE header and an outer IP header.

It encrypts the original packet and adds a new IP header.

It translates the original packet's MAC address to a new one.

A network architect is designing a data center fabric and needs to ensure that the physical network can support the overlay's requirements. Which consideration is most important for the underlay design?

IP connectivity between all devices that will act as VTEPs.

The overlay control plane must be configured first.

A single routing protocol for the entire network.

Layer 2 adjacency between all servers.

Juniper NetworksCertified Associate, Cloud

Domain 3Objective 2

Underlay and Overlay Networks JN0-214 Practice Questions (Page 3)

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 11–15

11application · medium
A company wants to connect two data centers to provide a single Layer 2 domain for a legacy application, but the WAN between them is a routed IP network. They also want to keep the configuration on the physical WAN routers unchanged. What approach should they use?
Select an answer first
12application · medium
A VTEP receives a VXLAN packet from the underlay. What is the first step the VTEP performs to process the packet?
Select an answer first
13foundation · easy
Which statement correctly contrasts the underlay and overlay networks?
Select an answer first
14foundation · easy
What is the basic operation of a GRE tunnel in an overlay network?
Select an answer first
15application · medium
A network architect is designing a data center fabric and needs to ensure that the physical network can support the overlay's requirements. Which consideration is most important for the underlay design?
Select an answer first

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