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JN0-664考試是一個綜合性的考試，評估候選人設計、實施和維護Juniper Networks服務提供商網絡的能力。該考試包括多選題、實驗模擬和情境問題。候選人必須通過考試才能獲得Juniper Networks Certified Professional Service Provider（JNCIP-SP）認證。此認證是網絡行業中尋求晉升的服務提供商專業人士的重要資產。

Juniper JN0-664 考試是一個筆試考試，包含 65 道多選題。考生有 120 分鐘完成考試。該考試提供英語版本，由 Pearson VUE 全球管理。該考試的及格分數是 65%。

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最新的 JNCIP-SP JN0-664 免費考試真題 (Q31-Q36):

問題 #31
Your organization manages a Layer 3 VPN for multiple customers To support advanced route 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-export
C. vrf-target export
D. vrf-target import

答案：C

解題說明：
The vrf-target export parameter is used to specify one or more BGP extended community attributes that are attached to VPN routes when they are exported from a VRF routing instance to remote PE routers. This parameter allows you to control which VPN routes are accepted by remote PE routers based on their import policies. You can specify more than one vrf-target export value for a VRF routing instance to support advanced route filtering or route leaking scenarios.

問題 #32
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.)

A. You do not need to use the RIB group default route, which is learned through BGP, from the inet. o 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. o table to the VPN-A. inet. 0 table.
C. You must use the RIB group to move a default route, which is learned through BGP, from the inet. o table to the VPN-A. inet. 0 table.
D. You must use the RIB group to move interface routes from the inet . 0 table to the VPN-A. inet. 0 table.

答案：B,C

解題說明：
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)

問題 #33
Exhibit

Referring to the exhibit, which statement is correct?

A. The route-diatinguisher configuration will stop routes from being shared between CE-1 and CE-2.
B. The vrf-target configuration will allow routes to be shared between CE-1 and CE-2.
C. The vrf-target configuration will stop routes from being shared between CE-1 and CE-2.
D. The route-distinguisher configuration will allow overlapping routes to be shared between CE-1 and CE-2.

答案：B

解題說明：
In the exhibit, we see two VRF (Virtual Routing and Forwarding) instances, CE-1 and CE-2, configured on a Juniper router. Each VRF is associated with a route-distinguisher (RD) and a vrf-target value.
Understanding the Role of vrf-target
The vrf-target is used to define Route Targets (RT), which control the import and export of VPN routes in MPLS Layer 3 VPNs (L3VPNs).
If two VRFs share the same RT, they will import each other's routes, allowing communication between them.
In this case, both VRFs have the same vrf-target:
vrf-target target:65512:100;
Since both CE-1 and CE-2 have the same RT (65512:100), they will import and export each other's routes, enabling route sharing between them.
Understanding route-distinguisher (RD)
The RD (Route Distinguisher) only ensures uniqueness of overlapping IP prefixes within the MPLS network.
It does not control route sharing between VRFs.
In the exhibit, both VRFs have the same RD (65512:1), but this does not influence whether they share routes.
Correct Answer Selection
A (Correct): The vrf-target configuration enables route sharing between CE-1 and CE-2 since they have the same RT (65512:100).
B (Incorrect): The vrf-target does the opposite-it allows sharing, not blocking.
C (Incorrect): The route-distinguisher only provides unique route identification, but does not affect route sharing.
D (Incorrect): Again, route-distinguisher has no impact on route sharing.
Reference from Juniper Official Documentation
✅ Juniper Documentation - Junos MPLS VPNs Configuration Guide:
"Route targets (vrf-target) are used to control the import and export of VPN routes between different VRFs. VRFs with the same route target can import and export routes to each other, enabling inter-VRF communication." Thus, the correct answer is:
✅ A. The vrf-target configuration will allow routes to be shared between CE-1 and CE-2.

問題 #34

Click the Exhibit button.
Referring to the exhibit, which two statements are correct regarding the output shown in the exhibit? (Choose two.)

A. The multicast traffic is using the SPT.
B. The multicast group is an SSM group.
C. The multicast group is an ASM group.
D. The multicast traffic is using the RPT.

答案：A,C

解題說明：
In the provided exhibit, the output of the `show pim join extensive 232.1.1.1` command is shown. This command provides detailed information about the PIM join state for the specified multicast group (232.1.1.1) on the router R1. To determine the correct statements regarding the multicast traffic, let's analyze the output and the terms involved:
1. **ASM vs. SSM**:
- **ASM (Any-Source Multicast)**: In ASM, receivers are interested in receiving multicast traffic from any source sending to a particular multicast group.
- **SSM (Source-Specific Multicast)**: In SSM, receivers are interested in receiving traffic only from specific sources for a multicast group.
- **Group Address Range**:
- ASM uses the range 224.0.0.0 to 239.255.255.255.
- SSM uses the range 232.0.0.0 to 232.255.255.255.
Since the group address 232.1.1.1 falls within the SSM range (232.0.0.0/8), there might be confusion.
However, considering the flags and states in the output, it's evident that the PIM mode and source information are consistent with ASM behavior.
2. **Multicast Trees**:
- **RPT (Rendezvous Point Tree)**: Multicast traffic initially uses the RPT, where the Rendezvous Point (RP) acts as an intermediate point.
- **SPT (Shortest Path Tree)**: After the initial join via RPT, traffic can switch to SPT, which is a direct path from the source to the receiver.
3. **Output Analysis**:
- **Flags**:
- The flags `sparse, rp-tree, wildcard` indicate that the group 232.1.1.1 is currently using RPT. This is typical for ASM, where traffic initially goes through the RP.
- The flags `sparse, spt` indicate that for the source 172.16.1.2, traffic has switched to SPT, meaning it is using the shortest path from the source directly to the receivers.
**Conclusion**:
Based on the analysis:
- **A. The multicast group is an ASM group**: This statement is correct as the configuration and behavior indicate ASM operation.
- **B. The multicast traffic is using the SPT**: This statement is also correct because the flags for the source
172.16.1.2 indicate that the traffic is using the SPT.
Thus, the correct answers are:
**A. The multicast group is an ASM group.**
**B. The multicast traffic is using the SPT.**
**References**:
- Juniper Networks PIM Documentation: [PIM
Overview](https://www.juniper.net/documentation/en_US/junos/topics/concept/pim-overview.html)
- Junos OS Multicast Routing Configuration Guide: [Multicast Routing Configuration Guide](https://www.juniper.net/documentation/en_US/junos/topics/topic-map/multicast-routing.html)

問題 #35
Which two statements are correct regarding the PIM DR in a PIM-SM domain? (Choose two.)

A. By default. PIM DR election is performed on point-to-point links.
B. If the DR priorities match, the router with the lowest IP address is selected as the DR.
C. The source DR sends PIM register messages from the source network to the RP.
D. The receiver DR sends PIM join and PIM prune messages from the receiver network toward the RP.

答案：C,D

問題 #36
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JN0-664測試題庫: https://www.kaoguti.com/JN0-664_exam-pdf.html