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Here you have the best Juniper JN0-680 practice exam questions

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  • These questions were last updated on May 14, 2026
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Question 1 of 64

Which EVPN service consists of a single broadcast domain per EVPN instance?

Answer

Suggested Answer

The suggested answer is B.

Reference:
https://tools.ietf.org/html/draft-ietf-l2vpn-evpn-08#section-6.1
Question 2 of 64

You are implementing a Virtual Chassis using QFX5100s and EX4300s in your data center.

In this scenario, which two statements are correct? (Choose two.)

Answer

Suggested Answer

The suggested answer is C, D.

Reference:
https://www.juniper.net/documentation/en_US/junos/topics/concept/virtual-chassis-ex-qfx-series-mixed-understanding.html
(EX4300s are only line
cards, QFX5100 can be line card).
Reference:
https://www.juniper.net/documentation/en_US/junos/topics/concept/virtual-chassis-ex4300-virtual-chassis-understanding.html
(Supports 40GE VCPs)
Question 3 of 64

A customer notices that all traffic is traveling over a single link within their partially meshed IP Fabric using IBGP. While troubleshooting, the customer notices that the configuration is missing a configuration parameter.

Which parameter would the customer use to solve this problem?

Answer

Suggested Answer

The suggested answer is C.

Reference:
https://www.juniper.net/documentation/en_US/junos/topics/reference/configuration-statement/add-path-edit-protocols-bgp.html
Question 4 of 64

Exam JN0-680: Question 4 - Image 1

A customer has a 3-stage Clos architecture with three spine devices as shown in the exhibit.If a single spine device fails, what percentage of the remaining bandwidth will be available from leaf node to leaf node?

Answer

Suggested Answer

The suggested answer is D.

Leaf-to-leaf communication has 3 paths via each Spine node; lose 1 Spine, lose 1 path, i.e. 33%
Question 5 of 64

Exam JN0-680: Question 5 - Image 1

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

Answer

Suggested Answer

The suggested answer is D.

Leaf = 480 Gbps southbound, 80 Gbps northbound; 480/80 = 6:1
Add a spine and northbound capacity is 120 Gbps; 480/120 = 4:1
Reference:
http://www.brocade.com/content/html/en/solution-design-guide/brocade-dc-fabric-architectures-sdg/GUID-A0E2AF7F-C47A-458D-989A-
35EC97E262DD.html

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