JN0-664試験の準備方法|正確的なJN0-664復習時間試験|更新するService Provider, Professional (JNCIP-SP)試験問題

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JN0-664復習時間, JN0-664試験問題, JN0-664関連問題資料, JN0-664的中率, JN0-664試験関連情報

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Juniper JN0-664 Exam Syllabus Topics:

Section Weight Objectives
Topic 1: VPNs and MPLS 20-25% - Layer 2 VPNs, LDP circuits, VPLS, and EVPN
- MPLS architecture, LDP, RSVP-TE, and label switching
- VPN configuration, monitoring, and troubleshooting
- Layer 3 VPNs: VRF, MP-BGP, route distinguishers, targets
Topic 2: OSPF 15-20% - OSPFv2 and OSPFv3 concepts and operation
- LSA types, flooding, and route summarization
- Virtual links, authentication, and routing policy
- Single-area and multi-area configuration and monitoring
Topic 3: IS-IS 15-20% - IS-IS levels, areas, and operation
- DIS operation and routing policy implementation
- Configuration and monitoring for single/multi-area
- Metrics, route summarization, and route leaking
Topic 4: BGP 20-25% - Policy-based routing, filtering, and route manipulation
- Attributes, communities, and multipath routing
- iBGP, eBGP, route reflection, and confederations
- Inter-AS routing and advanced BGP features
Topic 5: IP Multicast 10-15% - IGMPv2/v3, PIM dense mode, sparse mode, and SSM
- Multicast integration with IGP and BGP
- RPF check, multicast distribution trees, and troubleshooting
Topic 6: Class of Service (CoS) 10-15% - CoS configuration and monitoring in service provider networks
- Traffic classification, marking, and policing
- Queue scheduling, shaping, and congestion management

>> JN0-664復習時間 <<

JN0-664試験問題 & JN0-664関連問題資料

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Juniper Service Provider, Professional (JNCIP-SP) 認定 JN0-664 試験問題 (Q15-Q20):

質問 # 15
Your organization manages a Layer 3 VPN for multiple customers. To support advanced route filtering on your PE routers, you must advertise more than one BGP community on advertised VPN routes to remote PE routers.
Which routing-instance configuration parameter would support this requirement?

  • A. vrf-import
  • B. vrf-target export
  • C. vrf-target import
  • D. vrf-export

正解:D


質問 # 16
You are configuring anycast RP for load balancing and redundancy in your PIM-SM domain. You want to share active sources between RPs.
In this scenario, what are two solutions that will accomplish this task? (Choose two.)

  • A. Configure anycast PIM with the rp-set statement on each source DR router.
  • B. Configure MSDP on each RP router.
  • C. Configure MSDP on each source DR router.
  • D. Configure anycast PIM with the rp-set statement on each RP router.

正解:B、D

解説:
In a PIM Sparse Mode (PIM-SM) domain, Anycast RP is used for load balancing and redundancy by configuring multiple RPs with the same IP address. However, for active multicast sources to be shared between RPs, an additional mechanism is needed since PIM-SM does not automatically synchronize sources between RPs.
Evaluating the Answer Choices
Option A: "Configure MSDP on each RP router." ✅
Multicast Source Discovery Protocol (MSDP) is required in an Anycast RP setup to share active source information between RPs.
MSDP allows RPs to exchange source-active (SA) messages, ensuring that multicast receivers in different regions can still receive traffic from sources registered with different RPs.
Juniper Documentation confirms that MSDP is used to synchronize active sources across multiple RPs in an Anycast RP deployment.
✅ This is a correct answer.
Option B: "Configure anycast PIM with the rp-set statement on each RP router." ✅ Anycast PIM allows multiple RPs to share the same IP address, and the rp-set statement is used to define the set of Anycast RPs.
This enables receivers and sources to register with the closest RP.
However, Anycast PIM alone does not share active source information between RPs; MSDP is still needed for that.
The combination of Anycast PIM (rp-set) and MSDP is the correct approach.
✅ This is a correct answer.


質問 # 17
Exhibit

R4 is directly connected to both RPs (R2 and R3) R4 is currently sending all ,o,ns upstream to R3 but you want all joins to go to R2 instead Referring to the exhibit, which configuration change will solve this issue?

  • A. Change the bootstrap priority on R2 to be higher than R3
  • B. Change the local address on R2 to be higher than R3.
  • C. Change the default route in inet.2 on R4 from R3 as the next hop to R2
  • D. Change the group-range to be more specific on R2 than R3.

正解:D


質問 # 18
Exhibit

You are attempting to summarize routes from the 203.0.113.128/25 IP block on R8 to AS 64500. You implement the export policy shown in the exhibit and all routes from the routing table stop being advertised.
In this scenario, which two steps would you take to summarize the route in BGP? (Choose two.)

  • A. Remove the from protocol bgp command from the export policy.
  • B. Add the set routing-options static route 203.0.113.123/25 discard command.
  • C. Add the set protocols bgp family inet unicast add-path command to allow additional routes to the RIB tables. -
  • D. Replace exact in the export policy with orlonger.

正解:B、D

解説:
Explanation
To summarize routes from the 203.0.113.128/25 IP block on R8 to AS 64500, you need to do the following:
* Add the set routing-options static route 203.0.113.128/25 discard command. This creates a static route for the summary prefix and discards any traffic destined to it. This is necessary because BGP can only advertise routes that are present in the routing table.
* Replace exact in the export policy with orlonger. This allows R8 to match and advertise any route that is equal or more specific than the summary prefix. The exact term only matches routes that are exactly equal to the summary prefix, which is not present in the routing table.


質問 # 19
Refer to the exhibit.

Click the Exhibit button.
Referring to the exhibit, the PE-to-CE protocol being used is OSPF for the L3VPN. Also, there is an OSPF neighborship between CE-1 and CE-2.
Which statement is correct in this situation?

  • A. Hosts at Site-1 will reach hosts at Site-2 through the L3VPN by default.
  • B. You must set a high metric on the CE-1 to CE-2 link for hosts at Site-1 to use the L3VPN to reach hosts at Site-2.
  • C. Hosts at Site-1 will reach hosts at Site-2 through the CE-1 and CE-2 link by default.
  • D. You must set a high metric on the CE-1 to PE-1 link for hosts at Site-1 to use the CE-1 to CE-2 link to reach hosts at Site-2.

正解:C

解説:
In the exhibit, the PE-to-CE protocol used is OSPF, and there is an OSPF neighborship between CE-1 and CE-2 within the same Area 0. Let's analyze the default OSPF routing behavior in this setup to determine the correct statement.
1. **OSPF Neighborship**:
- CE-1 and CE-2 have an OSPF neighborship directly within Area 0.
- OSPF prefers intra-area routes over inter-area and external routes.
2. **Default Routing Behavior**:
- Since CE-1 and CE-2 are directly connected through an OSPF link within the same area, OSPF will prefer this direct intra-area path over any other paths learned via the PE routers and the L3VPN.
- This is because intra-area routes have a lower metric compared to inter-area or external routes.
3. **Metric Considerations**:
- By default, OSPF will route traffic between Site-1 and Site-2 through the direct link between CE-1 and CE-2, unless the link's metric is artificially increased to make it less preferable.
- There is no need to adjust metrics for the CE-1 to PE-1 link to prefer the CE-1 to CE-2 path, as OSPF already prefers direct intra-area paths.
**Conclusion**:
Given the default behavior of OSPF and the topology shown in the exhibit, the correct statement is:
**B. Hosts at Site-1 will reach hosts at Site-2 through the CE-1 and CE-2 link by default.**
**Reference**:
- OSPF Design Guide: [Juniper Networks OSPF Design Guide](https://www.juniper.net/documentation/en_US/junos/topics/concept/ospf-design-overview.html)
- Juniper Networks Technical Documentation on OSPF: [Junos OS OSPF Configuration Guide](https://www.juniper.net/documentation/en_US/junos/topics/concept/ospf-routing-overview.html)


質問 # 20
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