Juniper JN0-680 Actual Free Exam Questions & Community Discussion

Exam Code/Number: JN0-680
Exam Name/Title: Data Center, Professional
Certification Provider: Juniper
Corresponding Certification: JNCIP-DC

Exam Questions: 66
Updated On: May 29, 2026

Question #15

Referring to the exhibit, SW-3 and SW-4 have been configured for mixed-mode VCF and added to the VCF. After cabling the new devices into the VCF, you notice that SW-3 automatically joins the VCF, whereas SW-4 does not.
Why are SW-3 and SW-4 behaving this way? (Choose two.)

A. By default, EX4300 QSFP+ ports are enabled as VCPs.

B. By default, EX4300 QSPF+ ports are not enabled as VCPs.

C. By default, QFX5100 ports are enabled as VCPs.

D. By default, QFX5100 ports are not enabled as VCPs.

Discussion 0

Correct Answer: A,D Vote an answer

Question #16

You are attempting to deploy a VCF as shown in the exhibit.
SW-1 and SW-2 are functioning as the spine devices and SW-3 and SW-4 are functioning as the leaf devices.
However, the VCF is not functioning properly.
Which two actions would solve this problem? (Choose two.)

A. Switch the positions of SW-1 and SW-4.

B. Switch the positions of SW-1 and SW-3.

C. Switch the positions of SW-2 and SW-4.

D. Switch the positions of SW-2 and SW-3.

Discussion 0

Correct Answer: A,D Vote an answer

Question #17

Referring to the exhibit, which hardware change would be made to the IP Fabric to ensure an exact 4:1 oversubscription ratio?

A. Add a spine node to the IP Fabric.

B. Add two leaf nodes to the IP Fabric.

C. Add three leaf nodes to the IP Fabric.

D. Upgrade the fabric links to 100GbE.

Discussion 0

Correct Answer: A Vote an answer

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Question #18

You created an IP Fabric based on IBGP. You noticed that ECMP load sharing is not working.
In this scenario, what is the problem?

A. BGP route reflectors only reflect the best route.

B. Each member of the IP Fabric needs a different autonomous system number.

C. ECMP load sharing is only supported on 40GbE and 100GbE interfaces.

D. A route input policy needs to be added on all non-route reflectors to allow ECMP.

Discussion 0

Correct Answer: A,D Vote an answer

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Question #19

An EX9200 switch is acting as a Layer 3 VXLAN gateway.
In this scenario. which action will allow you to communicate between two VLANs?

A. Configure IRB interfaces to connect the VXLANs.

B. Configure L3 physical interfaces to connect the VXLANs.

C. Configure a VPLS instance.

D. Configure LAG interfaces to connect the VXLANs.

Discussion 0

Correct Answer: A Vote an answer

Question #20

The MC-LAG group shown in the exhibit is providing high availability services for the directly connected servers.
Where does Juniper Networks recommend you provide the backup liveness detection?

A. on the management interfaces

B. on the ICL-PL connection

C. on the ae1 interface

D. on the ae2 interface

Discussion 0

Correct Answer: A Vote an answer

Question #21

You want to converse IP address space and reduce your fabric management overhead.
For these reasons, you decided to use unnumbered Ethernet interfaces for your IP Fabric.
Which statement is correct in this scenario?

A. Only the IPv4 address family is supported on the interfaces.

B. OSPF is supported on unnumbered interfaces configured as a point-to-point connection.

C. The donor interface for an unnumbered interface must have only one configured IP address.

D. PIM is not supported on upstream unnumbered interfaces in the PIM topology.

Discussion 0

Correct Answer: B Vote an answer

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