TRAINING JN0-664 TOOLS - JN0-664 PRACTICE TESTS

Training JN0-664 Tools - JN0-664 Practice Tests

Training JN0-664 Tools - JN0-664 Practice Tests

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Juniper JN0-664 Certification Exam is a professional-level certification designed for individuals who are interested in pursuing a career in the service provider industry. Service Provider, Professional (JNCIP-SP) certification is designed to validate the skills and knowledge required to configure, troubleshoot, and maintain Juniper Networks' service provider routing and switching platforms.

As a JNCIP-SP certified professional, you will be able to demonstrate your expertise in the field of service provider networking technologies. Service Provider, Professional (JNCIP-SP) certification is highly respected in the industry and is recognized by many organizations globally. It can open up new career opportunities for you and help you advance your career.

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Juniper Service Provider, Professional (JNCIP-SP) Sample Questions (Q71-Q76):

NEW QUESTION # 71
Exhibit

You must ensure that the VPN backbone is preferred over the back door intra-area link as long as the VPN is available. Referring to the exhibit, which action will accomplish this task?

  • A. Configure an import routing policy on the CE routers that rejects OSPF routes learned on the backup intra-area link.
  • B. Configure the OSPF metric on the backup intra-area link that is higher than the L3VPN link.
  • C. Enable OSPF traffic-engineering.
  • D. Create an OSPF sham link between the PE routers.

Answer: D

Explanation:
A sham link is a logical link between two PE routers that belong to the same OSPF area but are connected through an L3VPN. A sham link makes the PE routers appear as if they are directly connected, and prevents OSPF from preferring an intra-area back door link over the VPN backbone. To create a sham link, you need to configure the local and remote addresses of the PE routers under the [edit protocols ospf area area-id] hierarchy level1.
https://www.juniper.net/documentation/us/en/software/junos/ospf/topics/topic-map/configuring-ospfv2-sham- links.html


NEW QUESTION # 72
Exhibit

A network designer would like to create a summary route as shown in the exhibit, but the configuration is not working.
Which three configuration changes will create a summary route? (Choose three.)

  • A. delete policy-options policy-statement leak-v6 term DC-routes from route-filter 2001: db9 :a: fa00 : :/6l longer
  • B. set policy-options policy-statement leak-v6 term DC-routes then reject
  • C. set protocols isis import summary-v6
  • D. delete protocols isis export summary-v6
  • E. set policy-options policy-statement leak-v6 term DC-routes from route-filter 2001:db9:a:faOO::/61 exact

Answer: A,D,E

Explanation:
To create a summary route for IS-IS, you need to configure a policy statement that matches the prefixes to be summarized and sets the next-hop to discard. You also need to configure a summary-address statement under the IS-IS protocol hierarchy that references the policy statement. In this case, the policy statement leak-v6 is trying to match the prefix 2001:db9:a:fa00::/61 exactly, but this prefix is not advertised by any router in the network. Therefore, no summary route is created. To fix this, you need to delete the longer keyword from the route-filter term and change the prefix length to /61 exact. This will match any prefix that falls within the /61 range. You also need to delete the export statement under protocols isis, because this will export all routes that match the policy statement to other IS-IS routers, which is not desired for a summary route.


NEW QUESTION # 73
Exhibit

Referring to the exhibit, which statement is true?

  • A. The 10.101.1.0/24 route will only be shared if BGP is configured in the routing instance
  • B. The 10.101.1 0/24 route will be shared if there are other VRFs that use the same route target community
  • C. The 10.101.1.0/24 route will be shared if the auto-export parameter is configured
  • D. The 10.101.1.0/24 route will be shared if the vrf-table-label parameter is configured.

Answer: C

Explanation:
The auto-export parameter is a routing option that allows a routing instance to share routes with other routing instances or the master routing table. The auto-export parameter automatically exports routes from one routing instance to another based on the route target communities attached to the routes. In this scenario, the
10.101.1.0/24 route will be shared if the auto-export parameter is configured under [edit routing-options] hierarchy level.


NEW QUESTION # 74
Which two statements about IS-IS are correct? (Choose two.)

  • A. CSNPs contain only descriptions of LSPs.
  • B. PSNPs are flooded periodically.
  • C. PSNPs contain only descriptions of LSPs.
  • D. CSNPs are flooded periodically.

Answer: C,D

Explanation:
Option A (Correct):
Complete Sequence Number PDUs (CSNPs) are periodically flooded by the Designated Intermediate System (DIS) on multi-access networks (e.g., Ethernet).
This ensures all routers on the segment synchronize their Link-State Databases (LSDBs).
Reference:
Option C (Correct):
Partial Sequence Number PDUs (PSNPs) contain only the headers (descriptions) of LSPs (e.g., LSP ID, sequence number, checksum).
PSNPs are used to:
Request missing LSPs (when a router detects discrepancies via CSNPs).
Acknowledge LSP receipt (in point-to-point networks).
They do not include the full LSP data.
Why Other Options Are Incorrect:
Option B: Incorrect. PSNPs are not flooded periodically-they are sent on-demand for specific LSP synchronization.
Option D: Incorrect. While CSNPs do contain LSP descriptions (headers), the term "only" is misleading. CSNPs summarize all LSPs in the LSDB, but they are not limited to "only" descriptions-they serve as a complete database overview.
Key Takeaways:
CSNPs are periodic, broadcast by the DIS, and ensure LSDB consistency.
PSNPs are triggered, contain specific LSP headers, and handle requests/acknowledgments.
IS-IS uses CSNPs and PSNPs to maintain efficient LSDB synchronization without flooding full LSPs unnecessarily.
For further details, refer to Juniper's official IS-IS documentation:
Juniper IS-IS Configuration Guide.


NEW QUESTION # 75
You have an L2VPN connecting two CEs across a provider network that runs OSPF. You have OSPF configured on both CEs.
Which two statements are correct in this scenario? (Choose two.)

  • A. The CE and PE OSPF areas can be different.
  • B. The CE and PE OSPF areas must match.
  • C. OSPF neighborship is formed between the two CEs.
  • D. OSPF neighborship is formed between the CEs and PEs.

Answer: A,C

Explanation:
In an L2VPN scenario, the provider network connects two customer edge (CE) devices across a Layer 2 virtual private network. Let's analyze how OSPF operates in this setup.
1. **OSPF Neighborship in L2VPN**:
- An L2VPN provides a Layer 2 connection between two sites, making it transparent to Layer 3 protocols like OSPF. This means the CEs can form OSPF adjacencies directly with each other as if they were on the same local network.
2. **OSPF Configuration on CEs and PEs**:
- **Statement A: OSPF neighborship is formed between the CEs and PEs**:
- Incorrect. In an L2VPN, the provider's network is transparent to the OSPF running on the CEs. OSPF neighborship forms directly between the CEs, not between the CEs and PEs.
- **Statement B: The CE and PE OSPF areas can be different**:
- Correct. Since OSPF adjacencies form directly between the CEs and not between CEs and PEs, the OSPF areas on the CEs and PEs can be different. The provider network acts as a transparent bridge, and OSPF doesn't see the PEs.
- **Statement C: The CE and PE OSPF areas must match**:
- Incorrect. As noted above, because the OSPF neighborship forms directly between the CEs, the OSPF areas on the CEs and PEs do not need to match.
- **Statement D: OSPF neighborship is formed between the two CEs**:
- Correct. The L2VPN makes the connection between the two CEs appear as a direct Layer 2 link, allowing them to form an OSPF adjacency directly.
**Conclusion**:
Given the above analysis, the correct statements are:
**B. The CE and PE OSPF areas can be different.**
**D. OSPF neighborship is formed between the two CEs.**
**References**:
- Juniper Networks Documentation on L2VPNs: [Configuring Layer 2 VPNs](https://www.juniper.net
/documentation/en_US/junos/topics/task/configuration/layer-2-vpns-configuring.html)
- OSPF Configuration Guide: [Junos OS OSPF Configuration](https://www.juniper.net/documentation/en_US
/junos/topics/concept/ospf-routing-overview.html)


NEW QUESTION # 76
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