Service Provider Routing and Switching, Professional (JNCIP-SP)

Here you have the best Juniper JN0-663 practice exam questions

  • You have 96 total questions across 20 pages (5 per page)
  • These questions were last updated on February 11, 2026
  • This site is not affiliated with or endorsed by Juniper.
Question 1 of 96
Exam JN0-663: Question 1 - Image 1
You notice an inconsistency between the routing table and the OSPF database, as shown in the exhibit.
What are two reasons for this behavior? (Choose two.)
Answer

Suggested Answer

The suggested answer is C, D.

An OSPF import policy allows you to prevent specific external routes from being added to the routing table, which can cause the inconsistency observed. The import policy impacts the routing table but does not affect the OSPF database. Additionally, the LSA is a Type 5 LSA, which is used for external routes in OSPF. Therefore, the reasons for the behavior are the use of an OSPF import policy and the presence of a Type 5 LSA.

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Question 2 of 96
Exam JN0-663: Question 2 - Image 1
R2 is receiving the same route from R1 and R3. You must ensure that you can load balance traffic for that route.
Referring to the exhibit, which two configuration changes will allow load balancing? (Choose two.)
Answer

Suggested Answer

The suggested answer is B, C.

To enable load balancing for the same route received from R1 and R3, you need to configure BGP multipath. This can be done under the global BGP configuration to apply it universally. Additionally, multipath can be configured under group R1 to ensure it is recognized and implemented correctly for the specific group. Applying a prepend policy as suggested in options A or D does not aid in load balancing. Instead, it affects route preference by making one path less preferred, which contradicts the goal of load balancing. Therefore, configuring multipath both globally and under group R1 enables BGP to recognize and use multiple paths for load balancing traffic effectively.

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Question 3 of 96
Exam JN0-663: Question 3 - Image 1
Referring to the exhibit, hosts in Site 1 and Site 2 are unable to communicate with each other through the Layer 3 VPN.
What is the problem?
Answer

Suggested Answer

The suggested answer is A.

The problem is that both sites are in the same autonomous system (AS 65111). In BGP (Border Gateway Protocol), if routes originate from the same AS, the routes could be rejected to prevent routing loops. In this scenario, each CE router will see its own AS in the AS path of the BGP update and will reject the route accordingly. This behavior can be modified by using features like AS-override, which allows the service provider to modify the AS path.

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Question 4 of 96
Exam JN0-663: Question 4 - Image 1
You manage an MX Series device which includes the configuration shown in the exhibit. Traffic marked with DSCP 000011 is entering the ge-1/0/4 interface at
102 Mbps. The traffic exits the device on the ge-1/0/5 interface. No other traffic is transiting the router.
In this scenario, what happens to traffic exceeding 100 Mbps?
Answer

Suggested Answer

The suggested answer is D.

In the given configuration and the details provided, there is no indication of any rate limiters or policers being applied to the traffic. The configuration only shows the classifiers and forwarding classes, but not the application of any specific rate limiting. Given that traffic marked with DSCP 000011 is assigned to the 'medium-priority' forwarding class and assuming a default scheduler behavior, without the presence of congestion or specific rate-limiting configurations, traffic exceeding 100 Mbps would still be forwarded, utilizing available bandwidth. Thus, the correct conclusion is that traffic exceeding 100 Mbps is forwarded.

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Question 5 of 96
What is the purpose of the cluster-list attribute within a BGP route reflector group?
Answer

Suggested Answer

The suggested answer is B.

The purpose of the cluster-list attribute within a BGP route reflector group is to facilitate loop detection within the route reflector network. In a BGP network, route reflectors are used to reduce the number of BGP sessions required and to improve scalability. The cluster-list attribute helps in preventing routing loops by keeping track of the route reflectors that a given route has passed through. If a route is received that has a cluster ID already present in the cluster-list, it indicates a loop and the route is discarded.

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About the Juniper JN0-663 Certification Exam

About the Exam

The Juniper JN0-663 (Service Provider Routing and Switching, Professional (JNCIP-SP)) validates your knowledge and skills. Passing demonstrates proficiency and can boost your career prospects in the field.

How to Prepare

Work through all 96 practice questions across 20 pages. Focus on understanding the reasoning behind each answer rather than memorizing responses to be ready for any variation on the real exam.

Why Practice Exams?

Practice exams help you familiarize yourself with the question format, manage your time, and reduce anxiety on the test day. Our JN0-663 questions are regularly updated to reflect the latest exam objectives.