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| Certification Vendor: | Juniper Networks |
|---|---|
| Exam Name: | Service Provider Routing and Switching, Professional (JNCIP-SP) |
| Exam Number: | JN0-664 |
| Exam Format: | Multiple choice (single answer, multiple answers) |
| Exam Price: | $400 USD |
| Related Certifications: | JNCIA-Junos JNCIS-SP JNCIE-SP |
| Certificate Validity Period: | 3 years |
| Exam Duration: | 90 minutes |
| Real Exam Qty: | 65 |
| Passing Score: | 70% (approximate, pass/fail result) |
| Available Languages: | English |
| Recommended Training: | Junos Layer 2 VPNs (JL2V) Advanced Junos Service Provider Routing (AJSPR) Junos Layer 3 VPNs (JL3V) |
| Exam Registration: | Pearson VUE Registration |
| Sample Questions: | Juniper JN0-664 Sample Questions |
| Exam Way: | Online proctored or onsite at Pearson VUE test centers |
| Pre Condition: | Juniper Networks Certified Specialist, Service Provider (JNCIS-SP) certification |
| Official Syllabus URL: | https://www.juniper.net/us/en/training/certification/tracks/service-provider-routing-switching/jncip-sp.html |
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The JN0-664 Exam is a challenging exam that requires a deep understanding of Juniper Networks technologies and their applications in service provider environments. It is designed to test the skills and knowledge of professionals who work with Juniper Networks technologies on a daily basis and who are responsible for maintaining and troubleshooting complex service provider networks.
NEW QUESTION # 89
An interface is configured with a behavior aggregate classifier and a multifield classifier How will the packet be processed when received on this interface?
Answer: A
Explanation:
When a Juniper device receives a packet on an interface with both a Behavior Aggregate (BA) classifier and a Multifield (MF) classifier, Junos OS follows a specific processing order to apply Class of Service (CoS).
Understanding the Classifiers in Junos CoS
1## Behavior Aggregate (BA) Classifier
* Uses packet headers (DSCP, IP precedence, or MPLS EXP bits) to classify traffic into forwarding classes.
* Applied at the ingress interface.
* Example: A packet with DSCP 46 (Expedited Forwarding) is mapped to a high-priority queue.
2## Multifield (MF) Classifier
* Uses match conditions (like source/destination IP, port numbers, protocol types) to classify traffic.
* Typically used for more granular classification beyond what BA can provide.
Junos Processing Order:
# When both BA and MF classifiers are configured on an interface, Junos first applies the BA classifier, then the MF classifier.
# MF classifier can override the BA classification if necessary.
Evaluating the Answer Choices
# B. The packet will be processed by the BA classifier first, then the MF classifier.
* Correct, because Junos first applies BA classification based on DSCP/MPLS EXP bits.
* After BA classification, the MF classifier is applied, which can refine or override the BA classification.
# A. The packet will be discarded.
* Incorrect, because classification does not drop packets unless explicitly configured with a filter or policing action.
# C. The packet will be forwarded with no classification changes.
* Incorrect, because both classifiers are applied in a specific order, meaning classification changes will occur.
# D. The packet will be processed by the MF classifier first, then the BA classifier.
* Incorrect, because BA classification is always applied first, followed by MF classification.
# B. The packet will be processed by the BA classifier first, then the MF classifier.
# Official Juniper Reference:
"When both BA and MF classifiers are applied on an interface, Junos OS first classifies packets using the BA classifier before applying the MF classifier."
NEW QUESTION # 90
A router running IS-IS is configured with an ISO address of 49.0001.00a0.c96b.c490.00.
Which part of this address is the system ID?
Answer: B
NEW QUESTION # 91
Refer to the exhibit.
Click the Exhibit button.
Referring to the exhibit, which two statements are true? (Choose two.)
Answer: A,C
Explanation:
In the exhibit, the output of the `show route protocol bgp` command is shown for the prefix `172.16.20.4/30`. Let's analyze the provided BGP routing table to determine which statements are correct.
1. **AS Path Analysis**:
- The AS path for the route `172.16.20.4/30` is shown as `2 I`.
- This indicates that the route was learned from AS 2 and it is an internal (iBGP) route within the same AS.
2. **Multiple Paths**:
- The route has two next-hop IP addresses: `10.0.18.2` via interface `ge-1/0/4.0` and `10.0.19.2` via interface `ge-1/0/5.0`.
- This indicates that BGP multipath is configured, which allows multiple equal-cost paths to be used for load balancing.
- BGP multipath must be explicitly configured to use multiple paths for the same prefix.
3. **Multihop vs. Multipath**:
- **Multihop Configuration**: This is typically used for establishing BGP sessions with peers that are not directly connected. It is not related to load balancing.
- **Multipath Configuration**: This is used to enable load balancing across multiple paths for the same prefix, which is the case here.
**Conclusion**:
Given the above analysis:
- **C. This route is learned from the same AS number**: Correct. The AS path `2 I` indicates the route was learned from the same AS number (AS 2).
- **D. The multipath configuration is used for load balancing**: Correct. The presence of multiple next-hops indicates that BGP multipath is configured for load balancing.
Thus, the correct answers are:
**C. This route is learned from the same AS number.**
**D. The multipath configuration is used for load balancing.**
**Reference**:
- Junos OS BGP Multipath Documentation: [Junos OS BGP Multipath](https://www.juniper.net/documentation/en_US/junos/topics/topic-map/bgp-multipath.html)
- Junos OS BGP Configuration Guide: [Junos OS BGP Configuration](https://www.juniper.net/documentation/en_US/junos/topics/concept/bgp-routing-overview.html)
NEW QUESTION # 92
You enabled a new router (R3) in your network but all destinations using IS-IS routes are not properly load balancing over this new router.
Referring to the exhibit, what is the problem?
Answer: C
NEW QUESTION # 93
Exhibit
Referring to the exhibit, PE-1 and PE-2 are getting route updates for VPN-B when neither of them service that VPN Which two actions would optimize this process? (Choose two.)
Answer: A,D
Explanation:
BGP route target filtering can be configured on PE devices or on route reflectors (RRs). Configuring BGP route target filtering on RRs is more efficient and scalable, as it reduces the number of BGP sessions and updates between PE devices. To configure BGP route target filtering on RRs, the following steps are required:
Configure the family route-target statement under the BGP group or neighbor configuration on the RRs. This enables the exchange of the route-target address family between the RRs and their clients (PE devices).
Configure the resolution rib bgp.l3vpn.0 resolution-ribs inet.0 statement under the routing-options configuration on the RRs. This enables the RRs to resolve next hops for VPN routes using the inet.0 routing table.
NEW QUESTION # 94
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