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[General] 100% Pass Quiz 2026 Juniper JN0-664: High Hit-Rate Service Provider, Professiona

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【General】 100% Pass Quiz 2026 Juniper JN0-664: High Hit-Rate Service Provider, Professiona

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Juniper Service Provider, Professional (JNCIP-SP) Sample Questions (Q76-Q81):NEW QUESTION # 76
A packet is received on an interface configured with transmission scheduling. One of the configured queues is exceeding the allocated bandwidth.
In this scenario, which two actions will be taken by default on a Junos device? (Choose two.)
  • A. The excess traffic will be discarded.
  • B. The exceeding queue will be considered to have positive bandwidth credit.
  • C. The excess traffic will use bandwidth available from other queues.
  • D. The exceeding queue will be considered to have negative bandwidth credit.
Answer: C,D
Explanation:
https://www.juniper.net/document ... junos/cos-security- devices/topics/concept/cos-transmission-scheduling-security-overview.html

NEW QUESTION # 77
Exhibit

You are examining an L3VPN route that includes the information shown in the exhibit Which statement is correct in this scenario?
  • A. The information shows a route target
  • B. The information shows a Type 2 route distinguisher.
  • C. The information shows a Type 1 route distinguisher.
  • D. The information shows a Type 0 route distinguisher
Answer: C
Explanation:
Type 1: When Type value is 1, the Administrator field is 4-bytes and Assigned Number field is 2-bytes. The Administrator field should be set to the IP address (public IP addresses should be used). The Assigned Number field contains a number from a numbering space that is administered by the enterprise to which the IP address has been assigned by the appropriate authority.

NEW QUESTION # 78
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 default route in inet.2 on R4 from R3 as the next hop to R2
  • C. Change the local address on R2 to be higher than R3.
  • D. Change the group-range to be more specific on R2 than R3.
Answer: D
Explanation:
The issue arises because R3's group-range (224.1.1.0/28) is more specific than R2's group-range (224.1.1.0/24). In PIM bootstrap (BSR), the RP with the longest prefix (most specific group-range) is preferred, regardless of priority. Even though R3 has a higher bootstrap priority (210 vs. R2's 200), its more specific /28 group-range takes precedence for groups within 224.1.1.0/28.
Why Option D is Correct:
To force R4 to use R2 for all joins, R2's group-range must be more specific than R3's. For example:
If R2's group-range is changed to 224.1.1.0/28 (same as R3) but with a higher priority, R2 would win (priority is compared only when group-ranges are equal).
If R2's group-range is changed to 224.1.1.0/29 (more specific than /28), it will override R3's /28 for groups in the /29 range.
The key is prefix specificity, which overrides priority in BSR elections.
Why Other Options Are Incorrect:
A . Change bootstrap priority on R2 to be higher than R3:
Priority is evaluated only when group-ranges are identical. Since R3's group-range (/28) is more specific than R2's (/24), R3 will still win for groups in 224.1.1.0/28, even if R2's priority is higher.
B . Change the default route in inet.2 on R4:
RPF routes (inet.2) determine how traffic reaches the RP, but they do not influence RP election logic (BSR priority/group-range).
C . Change R2's local address to be higher than R3's:
The RP address is a tiebreaker only if priorities and group-ranges are equal. Since R3's group-range is more specific, this change has no impact.
Key Takeaways:
BSR RP Election Order:
Longest group prefix (most specific).
Highest priority (if prefixes are equal).
Highest RP address (if prefixes and priorities are equal).
To override R3, R2 must advertise a more specific group-range (e.g., /28 or smaller) to ensure it is selected for the desired multicast groups.
Reference:
Juniper PIM Sparse Mode and BSR Configuration.

NEW QUESTION # 79
Exhibit

Which two statements are true about the OSPF adjacency displayed in the exhibit? (Choose two.)
  • A. There is a mismatch in the poll interval parameter between routers R1 and R2.
  • B. There is a mismatch in the dead interval parameter between routers R1 and R2.
  • C. There is a mismatch in the hello interval parameter between routers R1 and R2
  • D. There is a mismatch in the OSPF hold timer parameter between routers R1 and R2.
Answer: B,C
Explanation:
The hello interval is the time interval between two consecutive hello packets sent by an OSPF router on an interface. The dead interval is the time interval after which a neighbor is declared down if no hello packets are received from it. These parameters must match between two OSPF routers for them to form an adjacency. In the exhibit, router R1 has a hello interval of 10 seconds and a dead interval of 40 seconds, while router R2 has a hello interval of 30 seconds and a dead interval of 120 seconds. This causes a mismatch and prevents them from becoming neighbors23.

NEW QUESTION # 80
You must alter class-of-service values in packets on the outbound interface of an edge router.
In this scenario, which CoS component allows you to accomplish this task?
  • A. forwarding classes
  • B. rewrite rules
  • C. output policer
  • D. scheduler
Answer: B
Explanation:
Class of Service (CoS) in networking is used to manage traffic by classifying, scheduling, and sometimes modifying packets to ensure network performance and Quality of Service (QoS). Different CoS components are used to achieve these goals. Let's analyze each option to determine which CoS component allows you to alter class-of-service values on the outbound interface of an edge router.
1. **Output Policer**:
- Policing is used to control the rate of traffic sent to or from a network interface. It can drop or remark traffic that exceeds a certain rate.
- Policing is not typically used to alter CoS values but to enforce traffic limits.
2. **Scheduler**:
- A scheduler is responsible for managing the order in which packets are transmitted out of an interface based on their CoS markings. It can allocate bandwidth and prioritize traffic.
- The scheduler manages how packets are queued and sent but does not alter the CoS values of packets.
3. **Rewrite Rules**:
- Rewrite rules are used to modify the CoS values of packets, such as DSCP (Differentiated Services Code Point) or 802.1p bits, as they exit an interface.
- Rewrite rules can alter the class-of-service values in the packet headers to match the desired policies of the outbound interface.
- Therefore, rewrite rules are the correct component for altering CoS values on an outbound interface.
4. **Forwarding Classes**:
- Forwarding classes are used to categorize packets into different traffic classes within a router for QoS handling.
- They help in defining how packets should be treated by the scheduler but do not directly modify the CoS values.
**Conclusion**:
To alter class-of-service values in packets on the outbound interface of an edge router, the correct CoS component to use is:
**C. rewrite rules**
**References**:
- Juniper Networks Documentation on CoS: [Class of Service Overview](https://www.juniper.net
/documentation/en_US/junos/topics/concept/class-of-service-overview.html)
- Junos OS CoS Configuration Guide: [Rewrite Rules](https://www.juniper.net/documentation/en_US/junos
/topics/topic-map/class-of-service-rewrite-rules.html)

NEW QUESTION # 81
......
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