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Juniper JN0-664 Exam Questions

Exam Name: Service Provider Routing and Switching, Professional Exam
Exam Code: JN0-664 JNCIP-SP
Related Certification(s): Juniper Service Provider Routing & Switching Certification
Certification Provider: Juniper
Actual Exam Duration: 90 Minutes
Number of JN0-664 practice questions in our database: 96 (updated: Mar. 20, 2025)
Expected JN0-664 Exam Topics, as suggested by Juniper :
  • Topic 1: OSPF: In this topic, Juniper networking professionals delve into the core concepts and operations of OSPFv2 and OSPFv3. The focus is on configuring and monitoring single-area and multi-area OSPF scenarios. This ensures proficiency in managing link-state routing protocols and enhancing network efficiency. Understanding OSPF prepares the audience to address challenges in service provider environments effectively.
  • Topic 2: IS-IS: This topic provides an in-depth exploration of the Intermediate System to Intermediate System (IS-IS) protocol, focusing on its operation and concepts. Juniper networking professionals learn how to configure and monitor single-area and multi-area IS-IS, equipping them with skills essential for maintaining scalable and robust routing infrastructures in large networks.
  • Topic 3: BGP: The concepts, operation, and functionality of Border Gateway Protocol (BGP) form the crux of this topic. Juniper networking professionals gain insights into BGP scaling mechanisms and develop expertise in configuring and monitoring BGP in complex scenarios. Mastery of BGP is vital for optimizing route distribution and achieving efficient inter-domain routing.
  • Topic 4: Class of Service (CoS): This topic emphasizes the principles of Junos OS Class of Service (CoS). Juniper networking professionals learn to configure and monitor CoS for efficient traffic prioritization. This ensures service quality by managing bandwidth, latency, and packet loss, a critical aspect of service provider network optimization.
  • Topic 5: IP Multicast: Aspiring Juniper networking professionals explore the concepts and operations of IP multicast, including IGMP, PIM dense mode, and PIM sparse mode (including SSM). The topic focuses on configuration and monitoring techniques, enabling efficient delivery of multicast traffic across the network while optimizing resource utilization.
  • Topic 6: Layer 3 VPNs: This topic covers the concepts and operation of Layer 3 VPNs, including their configuration and monitoring. Juniper networking professionals also explore Junos OS support for carrier-of-carriers and inter-provider VPN models. These skills are crucial for managing secure, scalable, and interconnected multi-tenant network environments.
  • Topic 7: Layer 2 VPNs: Juniper networking professionals gain comprehensive knowledge of Layer 2 VPNs, including BGP Layer 2 VPNs, LDP Layer 2 circuits, VPLS, and EVPN. This topic focuses on configuring, monitoring, and troubleshooting Layer 2 VPNs, ensuring expertise in providing efficient and seamless layer 2 connectivity across service provider networks.
Disscuss Juniper JN0-664 Topics, Questions or Ask Anything Related

Shawnna

6 hours ago
Segment Routing topics were tested. Be prepared for questions on SR-MPLS and SRv6. Study the basics of segment routing implementation.
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Anna

6 days ago
Just became Juniper certified! Pass4Success's JNCIP-SP prep was worth every penny.
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Tammi

16 days ago
Junos OS Evolved was part of the exam. Expect questions on architecture and features. Understand the differences between Junos OS and Junos OS Evolved.
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Candida

1 months ago
EVPN concepts were included. Questions on EVPN types and use cases came up. Review EVPN-VXLAN implementations.
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Loren

1 months ago
Pass4Success's JNCIP-SP materials were a lifesaver. Passed with flying colors!
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Ellen

2 months ago
Network security topics appeared. Be ready for questions on firewall filters and policing. Study how to implement basic security measures on Juniper devices.
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Nelida

2 months ago
High availability features were tested. Expect questions on GRES and NSR. Understand the differences between these redundancy methods.
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Keshia

2 months ago
Aced the JNCIP-SP thanks to Pass4Success. Their questions were so close to the real thing!
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Loren

2 months ago
I just cleared the Juniper Service Provider Routing and Switching, Professional Exam, and the Pass4Success practice questions were incredibly helpful. One challenging question was about Layer 3 VPNs and the use of route distinguishers. I wasn't sure about the exact differences, but I still passed the exam.
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Amina

3 months ago
Multicast routing was covered. Questions on PIM modes and IGMP were common. Review multicast forwarding concepts and protocols.
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Salome

3 months ago
Layer 3 VPNs were a significant part. Be prepared for questions on VRF configuration and route distinguishers. Understand how to implement L3VPNs on Juniper routers.
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Essie

3 months ago
JNCIP-SP certified! Pass4Success made all the difference in my quick exam prep.
upvoted 0 times
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Cammy

3 months ago
Passing the Juniper Service Provider Routing and Switching, Professional Exam was a great achievement, and the Pass4Success practice questions were essential. There was a tricky question about BGP and the use of route reflectors. I wasn't completely confident in my answer, but I managed to pass.
upvoted 0 times
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Wilda

3 months ago
Layer 2 VPNs were tested. Expect questions on VPLS and L2 Circuit configurations. Study the differences between these technologies.
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Louisa

4 months ago
I recently passed the Juniper Service Provider Routing and Switching, Professional Exam, and the Pass4Success practice questions were a great help. One question that stumped me was about IS-IS and the differences between Level 1 and Level 2 routing. I wasn't entirely sure about the specifics, but I still passed the exam.
upvoted 0 times
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Dierdre

4 months ago
QoS topics appeared in several questions. Focus on classification, policing, and shaping concepts. Know how to implement DiffServ on Juniper devices.
upvoted 0 times
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Stefania

4 months ago
Couldn't have passed the Juniper JNCIP-SP without Pass4Success. Their prep was spot-on!
upvoted 0 times
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Merilyn

4 months ago
Clearing the Juniper Service Provider Routing and Switching, Professional Exam was a significant milestone for me, thanks to Pass4Success practice questions. A challenging question was about OSPF and the different types of LSAs. I wasn't completely confident in my answer, but I managed to get through.
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Scarlet

4 months ago
IPv6 routing was covered extensively. Practice IPv6 addressing and subnetting. Understand IPv6 transition mechanisms like 6PE and 6VPE.
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Kayleigh

5 months ago
I passed the Juniper Service Provider Routing and Switching, Professional Exam, and the Pass4Success practice questions were invaluable. One question that I found difficult was about IP Multicast and the differences between PIM-SM and PIM-DM. I wasn't sure about the best use cases for each, but I still passed.
upvoted 0 times
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Germaine

5 months ago
Pass4Success nailed it with their JNCIP-SP practice questions. Exam success in record time!
upvoted 0 times
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Vilma

5 months ago
IS-IS configuration was tested. Be ready for questions on IS-IS levels and area types. Study the differences between Level 1 and Level 2 routing.
upvoted 0 times
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Anglea

5 months ago
The Juniper Service Provider Routing and Switching, Professional Exam was tough, but I passed it with the help of Pass4Success practice questions. There was a question about Class of Service (CoS) and the different types of traffic shaping techniques. I wasn't entirely sure about the specifics, but I managed to pass.
upvoted 0 times
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Jin

6 months ago
MPLS came up frequently. Questions on RSVP-TE and LDP were common. Review LSP establishment methods and label distribution protocols.
upvoted 0 times
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Delisa

6 months ago
I just cleared the Juniper Service Provider Routing and Switching, Professional Exam, and the Pass4Success practice questions were a lifesaver. One challenging question was about Layer 2 VPNs and the differences between VPLS and VPWS. I wasn't completely confident in my answer, but I still passed the exam.
upvoted 0 times
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Hayley

6 months ago
Whew, that JNCIP-SP exam was tough! Glad I used Pass4Success to study. Passed on my first try!
upvoted 0 times
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Audry

6 months ago
BGP was a major focus. Expect questions on BGP path attributes and route selection process. Make sure you understand how BGP chooses the best path.
upvoted 0 times
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Malcom

6 months ago
Passing the Juniper Service Provider Routing and Switching, Professional Exam was a great achievement for me, thanks to the Pass4Success practice questions. I remember a tricky question about configuring Layer 3 VPNs, specifically about the use of route distinguishers and route targets. I was a bit unsure about the exact differences, but I still managed to get through.
upvoted 0 times
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Catalina

7 months ago
Just passed the Juniper JNCIP-SP exam! The OSPF section was challenging. Be prepared for questions on OSPF areas and LSA types. Study area types and their characteristics thoroughly.
upvoted 0 times
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Cordelia

7 months ago
I recently passed the Juniper Service Provider Routing and Switching, Professional Exam, and I must say, the Pass4Success practice questions were incredibly helpful. One question that stumped me was about the BGP route reflectors and their role in reducing the number of BGP sessions in a network. I wasn't entirely sure about the best practices for configuring them, but I managed to pass the exam.
upvoted 0 times
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Tamekia

7 months ago
Just passed the Juniper JNCIP-SP exam! Thanks Pass4Success for the great prep materials.
upvoted 0 times
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Alesia

7 months ago
Thanks to Pass4Success practice questions, I was able to pass the Juniper Service Provider Routing and Switching, Professional Exam. The exam included questions on metrics and external metric types in OSPF, which I had studied extensively with the help of practice questions. One question that challenged me was related to the operation of Designated Router and Backup Designated Router, where I had to apply my knowledge to select the right answer.
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Zona

8 months ago
My exam experience was successful as I passed the Juniper Service Provider Routing and Switching, Professional Exam using Pass4Success practice questions. The exam covered topics like the operation of Designated Intermediate System (DIS) in IS-IS. One question that I remember was about the concepts and functionality of IS-IS, which required a deep understanding of the protocol. Despite some uncertainty, I managed to answer correctly and pass the exam.
upvoted 0 times
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Adela

9 months ago
JNCIP-SP certification achieved! Pass4Success's exam questions were invaluable. Couldn't have done it without them!
upvoted 0 times
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Dean

9 months ago
Passed JNCIP-SP on my first try! Pass4Success's practice tests were incredibly similar to the real exam. Thank you!
upvoted 0 times
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Nelida

9 months ago
JNCIP-SP certified! Pass4Success's exam prep was a lifesaver. Grateful for their accurate and up-to-date questions.
upvoted 0 times
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Buddy

9 months ago
I passed the Juniper Service Provider Routing and Switching, Professional Exam with the help of Pass4Success practice questions. The exam was challenging, but I felt well-prepared thanks to the practice questions. One question that stood out to me was related to the operation of Designated Router and Backup Designated Router in OSPF. I had to carefully consider the metrics and external metric types to choose the correct answer.
upvoted 0 times
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Evan

9 months ago
Just passed the JNCIP-SP exam! Pass4Success's practice questions were spot-on and saved me tons of study time. Thanks!
upvoted 0 times
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Flo

10 months ago
BGP was heavily tested in my exam. Be ready for complex scenarios involving BGP route reflection and AS path manipulation. Study BGP attributes and their impact on path selection. Pass4Success provided relevant practice that was instrumental in my success.
upvoted 0 times
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Domonique

10 months ago
Aced the JNCIP-SP exam today! Pass4Success's materials were crucial for my quick preparation. Highly recommend!
upvoted 0 times
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Free Juniper JN0-664 Exam Actual Questions

Note: Premium Questions for JN0-664 were last updated On Mar. 20, 2025 (see below)

Question #1

By default, which statement is correct about OSPF summary LSAs?

Reveal Solution Hide Solution
Correct Answer: C

OSPF uses different types of LSAs to describe different aspects of the network topology. Type 1 LSAs are also known as router LSAs, and they describe the links and interfaces of a router within an area. Type 3 LSAs are also known as summary LSAs, and they describe routes to networks outside an area but within the same autonomous system (AS). By default, OSPF will summarize routes from Type 1 LSAs into Type 3 LSAs when advertising them across area boundaries .


Question #2

Click the Exhibit button.

Referring to the exhibit, which statement is correct?

Reveal Solution Hide Solution
Correct Answer: A

The exhibit shows the configuration of a VRF (Virtual Routing and Forwarding) instance on a Juniper PE router. Let's break down the key components:

VRF Configuration (VPN-A)

The instance type is VRF, meaning this is an L3VPN (Layer 3 VPN).

The routing instance contains a static route (10.1.0.0/16 next-hop 10.1.0.1).

The interface ge-0/0/2.0 is assigned to the VRF.

Route Distinguisher (RD): 172.17.20.1:1

VRF-Export Policy: vpn-a-export

VRF-Target: target:65512:1 (This defines which routes will be imported into the VRF).

VRF Export Policy (vpn-a-export)

The vpn-a-export policy adds two BGP communities (route targets) to exported VPN routes:

community add vpn-a-target;

community add vpn-m-target;

accept;

The vpn-a-target community corresponds to target:65512:1.

The vpn-m-target community corresponds to target:65512:2.

Policy-Options (Community Definitions)

community vpn-a-target members target:65512:1;

community vpn-m-target members target:65512:2;

This confirms that routes exported from this VRF will have BOTH target:65512:1 and target:65512:2.

Evaluating the Answer Choices

Option A: 'VPN routes are exported with the target:65512:1 and target:65512:2 route targets.'

The vpn-a-export policy explicitly adds both vpn-a-target (65512:1) and vpn-m-target (65512:2) to exported routes.

This is correct.

Option B: 'You cannot use the vrf-target and vrf-export statements in the same VRF.'

This is incorrect.

Juniper allows the use of both vrf-target and vrf-export in the same VRF:

vrf-target is used for importing routes.

vrf-export defines export policies (which can add additional route targets).

This is incorrect.

Option C: 'VPN routes with the target:65512:1 and target:65512:2 route targets are imported.'

The vrf-target target:65512:1; statement only controls importing routes.

The import policy does not include target:65512:2, so routes tagged with target:65512:2 alone would not be imported into this VRF.

This is incorrect.

Option D: 'VPN routes are exported with only the target:65512:1 route target.'

The export policy (vpn-a-export) clearly adds both 65512:1 and 65512:2.

This is incorrect.

Final Answer:

A. VPN routes are exported with the target:65512:1 and target:65512:2 route targets.

Verification from Juniper Documentation

Juniper MPLS L3VPN Configuration Guide confirms that vrf-target is used for importing, while vrf-export can be used for exporting multiple route targets.

Juniper Routing Policy Documentation states that export policies can add multiple BGP communities (route targets).

RFC 4364 (BGP/MPLS IP VPNs) defines the use of route targets for VPN route control.


Question #3

Refer to the exhibit.

Click the Exhibit hutton.

You are configuring an interprovider Option C Layer 3 VPN to connect two customer sites.

Referring to the exhibit, which three statements are correct? (Choose three.)

Reveal Solution Hide Solution
Correct Answer: A, B, C

Interprovider Option C for Layer 3 VPNs involves the use of Autonomous System Boundary Routers (ASBRs) to exchange labeled VPN-IPv4 routes between different Autonomous Systems (AS). This option requires BGP sessions between ASBRs, and the VPN routes are carried end-to-end using MPLS labels. Here's a detailed analysis of the roles of different routers in this scenario:

1. **ASBR Routers**:

- ASBRs are responsible for exchanging VPN-IPv4 routes between different ASes.

- **A. ASBR routers maintain the internal routes from its own AS and the loopback addresses from the other AS PEs.**

- Correct. ASBRs maintain routes to internal destinations within their own AS, and they also need to know the loopback addresses of PEs in the other AS to set up the BGP sessions and MPLS tunnels.

2. **PE Routers**:

- PE routers are responsible for maintaining VPN routes and label information to forward VPN traffic correctly.

- **B. PE routers maintain the internal routes from its own AS, the loopback address from the other AS PEs, and the L3VPN routes.**

- Correct. PE routers need to maintain:

- Internal routes within their AS for routing.

- Loopback addresses of other AS PEs for establishing MPLS LSPs.

- L3VPN routes to provide end-to-end VPN connectivity.

3. **P Routers**:

- P routers are the core routers that do not participate in BGP VPN routing but forward labeled packets based on MPLS labels.

- **C. P routers only maintain the internal routes from their own AS.**

- Correct. P routers maintain the internal routing information to forward packets within the AS and use MPLS labels for forwarding VPN packets. They do not maintain VPN routes or routes from other ASes.

4. **Incorrect Statements**:

- **D. P routers maintain the internal routes from its own AS and the loopback address from the other AS PEs.**

- Incorrect. P routers do not need to maintain the loopback addresses of other AS PEs. They only maintain internal routing and MPLS label information.

- **E. ASBR routers maintain the internal routes from its own AS, the loopback address from the other AS PEs, and the L3VPN routes.**

- Incorrect. ASBR routers do not maintain L3VPN routes. They exchange labeled VPN-IPv4 routes with other ASBRs and forward them to PE routers.

**Conclusion**:

The correct answers are:

**A. ASBR routers maintain the internal routes from its own AS and the loopback addresses from the other AS PEs.**

**B. PE routers maintain the internal routes from its own AS, the loopback address from the other AS PEs, and the L3VPN routes.**

**C. P routers only maintain the internal routes from their own AS.**

**Reference**:

- Juniper Networks Documentation on Interprovider VPNs: [Interprovider VPN Configuration](https://www.juniper.net/documentation/en_US/junos/topics/topic-map/mpls-vpn-interprovider.html)

- MPLS and VPN Architectures, CCIP Edition by Ivan Pepelnjak and Jim Guichard


Question #4

Refer to the exhibit.

Click the Exhibit button.

Referring to the exhibit, you must provide VRF Internet access over a single connection for VPN-A Site 1, which connects to PE-1.

Which two statements are correct in this scenario? (Choose two.)

Reveal Solution Hide Solution
Correct Answer: A, B

In the provided exhibit, the configuration involves using a RIB (Routing Information Base) group to facilitate internet access for VPN-A Site 1 through PE-1. The goal is to provide VRF Internet access over a single connection.

1. **Understanding RIB Groups**:

- RIB groups allow for the import and export of routes between different routing tables.

- In this scenario, we have two RIBs: `inet.0` (the main routing table) and `VPN-A.inet.0` (the VRF-specific routing table).

2. **Statement Analysis**:

- **A. You must use the RIB group to move a default route, which is learned through BGP, from the inet.0 table to the VPN-A.inet.0 table.**

- Correct. To provide Internet access to VPN-A, the default route (0.0.0.0/0) learned via BGP in the `inet.0` table must be made available in the `VPN-A.inet.0` table. This is done using the RIB group to import the default route.

- **B. You do not need to use the RIB group to move interface routes from the inet.0 table to the VPN-A.inet.0 table.**

- Correct. Interface routes (connected routes) are typically directly added to both the global and the VRF routing tables without needing a RIB group. These routes are known to the VRF because the interfaces are part of the VRF configuration.

- **C. You do not need to use the RIB group default route, which is learned through BGP, from the inet.0 table to the VPN-A.inet.0 table.**

- Incorrect. As discussed, the default route needs to be imported into the VRF's routing table using a RIB group to enable Internet access for the VRF.

- **D. You must use the RIB group to move interface routes from the inet.0 table to the VPN-A.inet.0 table.**

- Incorrect. Interface routes are directly associated with the VRF interfaces and are automatically known to the VRF routing table. There is no need to use a RIB group for these routes.

**Conclusion**:

The correct answers are:

**A. You must use the RIB group to move a default route, which is learned through BGP, from the inet.0 table to the VPN-A.inet.0 table.**

**B. You do not need to use the RIB group to move interface routes from the inet.0 table to the VPN-A.inet.0 table.**

**Reference**:

- Juniper Networks Documentation on RIB Groups: [RIB Groups Overview](https://www.juniper.net/documentation/en_US/junos/topics/concept/rib-groups-overview.html)

- Junos OS VPNs Configuration Guide: [Junos VPNs Configuration](https://www.juniper.net/documentation/en_US/junos/topics/concept/vpns-overview.html)


Question #5

Which two statements about IS-IS are correct? (Choose two.)

Reveal Solution Hide Solution
Correct Answer: A, D

Intermediate System to Intermediate System (IS-IS) is a link-state routing protocol used to move information efficiently within a computer network. It uses a series of Protocol Data Units (PDUs) to manage the network's topology and ensure consistency across all routers in the network. Specifically, Link State PDUs (LSPs), Complete Sequence Number PDUs (CSNPs), and Partial Sequence Number PDUs (PSNPs) play crucial roles in this process.

1. **PSNPs (Partial Sequence Number PDUs)**:

- **Acknowledge a received LSP**: PSNPs are used to acknowledge the receipt of LSPs. When a router receives an LSP, it sends a PSNP back to the sender to confirm that the LSP has been received.

- **Request a missing LSP**: PSNPs are also used to request missing LSPs. If a router identifies a missing LSP based on sequence numbers, it can send a PSNP to request the specific LSP from its neighbors.

2. **CSNPs (Complete Sequence Number PDUs)**:

- **Summarize LSPs**: CSNPs are used to summarize all the LSPs known to a router. They are typically sent at regular intervals to provide a complete list of LSPs in a database. They are not used to acknowledge or request specific LSPs but provide an overview of all LSPs for database synchronization.

Based on this understanding, let's evaluate the statements:

- **A. PSNPs are used to acknowledge a received LSP.**

- Correct. PSNPs serve the purpose of acknowledging LSPs received from other routers.

- **B. CSNPs are used to acknowledge a received LSP.**

- Incorrect. CSNPs are not used for acknowledging LSPs; they are used to provide a summary of all LSPs.

- **C. CSNPs are used to request a missing LSP.**

- Incorrect. CSNPs are not used to request missing LSPs; this is the role of PSNPs.

- **D. PSNPs are used to request a missing LSP.**

- Correct. PSNPs are used to request specific missing LSPs when a router detects that it is missing information.

**Conclusion**:

The correct statements about IS-IS are:

**A. PSNPs are used to acknowledge a received LSP.**

**D. PSNPs are used to request a missing LSP.**

**Reference**:

- Juniper Networks Documentation on IS-IS: [IS-IS Overview](https://www.juniper.net/documentation/en_US/junos/topics/concept/is-is-routing-overview.html)

- RFC 1195, Use of OSI IS-IS for Routing in TCP/IP and Dual Environments: [RFC 1195](https://tools.ietf.org/html/rfc1195) which details the operation and use of IS-IS, including the roles of PSNPs and CSNPs.



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