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The Juniper JN0-664 exam is a professional-level certification exam for service provider professionals seeking to advance their careers. The exam is designed to test the candidate's knowledge and skills in configuring and troubleshooting Junos-based service provider routing platforms and networks. Passing the exam validates the candidate's expertise in designing, implementing, and maintaining Juniper Networks service provider networks.

The JN0-664 exam is a comprehensive exam that evaluates the candidate's ability to design, implement, and maintain Juniper Networks service provider networks. The exam consists of multiple-choice questions, lab simulations, and scenario-based questions. Candidates must pass the exam to obtain the Juniper Networks Certified Professional Service Provider (JNCIP-SP) certification. The certification is a valuable asset for service provider professionals seeking to advance their careers in the networking industry.

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The Juniper JN0-664 (Service Provider, Professional (JNCIP-SP)) certification exam is a comprehensive exam that is designed to test the skills and knowledge of professionals who work with Juniper Networks technologies in service provider environments. It is a challenging exam that requires a deep understanding of Juniper Networks technologies and their applications in service provider environments. The certification is globally recognized and is a valuable credential for professionals who work with Juniper Networks technologies in service provider environments.

Juniper Service Provider, Professional (JNCIP-SP) Sample Questions (Q11-Q16):

NEW QUESTION # 11
In IS-IS, which two statements are correct about the designated intermediate system (DIS) on a multi-access network segment? (Choose two)

  • A. On the multi-access network, each router forms an adjacency to every other router on the segment
  • B. A router with a priority of 1 wins the DIS election over a router with a priority of 10.
  • C. On the multi-access network, each router only forms an adjacency to the DIS.
  • D. A router with a priority of 10 wins the DIS election over a router with a priority of 1.

Answer: C,D

Explanation:
Explanation
In IS-IS, a designated intermediate system (DIS) is a router that is elected on a multi-access network segment (such as Ethernet) to perform some functions on behalf of other routers on the same segment. A DIS is responsible for sending network link-state advertisements (LSPs), which describe all the routers attached to the network. These LSPs are flooded throughout a single area. A DIS also generates pseudonode LSPs, which represent the multi-access network as a single node in the link-state database. A DIS election is based on the priority value configured on each router's interface connected to the multi-access network. The priority value ranges from 0 to 127, with higher values indicating higher priority. The router with the highest priority becomes the DIS for the area (Level 1, Level 2, or both). If routers have the same priority, then the router with the highest MAC address is elected as the DIS. By default, routers have a priority value of 64. On a multi-access network, each router only forms an adjacency to the DIS, not to every other router on the segment. This reduces the amount of hello packets and LSP


NEW QUESTION # 12
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.)

  • A. Configure the resolution rib bgp.l3vpn.O resolution-ribs inet. 0 Statement on the RR
  • B. Configure the family route-target statement on the PEs.
  • C. Configure the family route-target statement on the RR
  • D. Configure the resolution rib bgp . 13vpn . 0 resolution-ribs inet. 0 Statement on the PEs.

Answer: A,C

Explanation:
Explanation
BGP route target filtering is a technique that reduces the number of routers that receive VPN routes and route updates, helping to limit the amount of overhead associated with running a VPN. BGP route target filtering is based on the exchange of the route-target address family, which contains information about the VPN membership of each PE device. Based on this information, a PE device can decide whether to accept or reject VPN routes from another PE device.
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.
* Configure an export policy for BGP route target filtering under the routing-options configuration on the RRs. This policy controls which route targets are advertised to each PE device based on their VPN membership.


NEW QUESTION # 13
Which two statements are correct about the customer interface in an LDP-signaled pseudowire? (Choose two)

  • A. When the encapsulation is vlan-ccc or extended-vlan-ccc, the configured VLAN tag is not included in the control plane LDP advertisement
  • B. When the encapsulation is vLan-ccc or extended-vlan-ccc, the configured VLAN tag is included in the control plane LDP advertisement
  • C. When the encapsulation is ethemet-ccc, tagged and untagged frames are both accepted in the data plane.
  • D. When the encapsulation is ethernet-ccc, only frames without a VLAN tag are accepted in the data plane

Answer: B,C

Explanation:
Explanation
The customer interface in an LDP-signaled pseudowire is the interface on the PE router that connects to the CE device. An LDP-signaled pseudowire is a type of Layer 2 circuit that uses LDP to establish a point-to-point connection between two PE routers over an MPLS network. The customer interface can have different encapsulation types depending on the type of traffic that is carried over the pseudowire. The encapsulation types are ethernet-ccc, vlan-ccc, extended-vlan-ccc, atm-ccc, frame-relay-ccc, ppp-ccc, cisco-hdlc-ccc, and tcc-ccc. Depending on the encapsulation type, the customer interface can accept or reject tagged or untagged frames in the data plane, and include or exclude VLAN tags in the control plane LDP advertisement. The following table summarizes the behavior of different encapsulation types:


NEW QUESTION # 14
You are asked to protect your company's customers from amplification attacks. In this scenario, what is Juniper's recommended protection method?

  • A. unicast Reverse Path Forwarding
  • B. ASN prepending
  • C. destination-based Remote Triggered Black Hole
  • D. BGP FlowSpec

Answer: C

Explanation:
Explanation
amplification attacks are a type of distributed denial-of-service (DDoS) attack that exploit the characteristics of certain protocols to amplify the traffic sent to a victim. For example, an attacker can send a small DNS query with a spoofed source IP address to a DNS server, which will reply with a much larger response to the victim. This way, the attacker can generate a large amount of traffic with minimal resources.
One of the methods to protect against amplification attacks is destination-based Remote Triggered Black Hole (RTBH) filtering. This technique allows a network operator to drop traffic destined to a specific IP address or prefix at the edge of the network, thus preventing it from reaching the victim and consuming bandwidth and resources. RTBH filtering can be implemented using BGP to propagate a special route with a next hop of
192.0.2.1 (a reserved address) to the edge routers. Any traffic matching this route will be discarded by the edge routers.


NEW QUESTION # 15
What is the correct order of packet flow through configurable components in the Junos OS CoS features?

  • A. Behavior Aggregate Classifier -> Multifield Classifier -> Input Policer -> Forwarding Policy Options -> Fabric Scheduler -> Output Policer -> Scheduler/Shaper/RED -> Rewrite Marker
  • B. Multifield Classifier -> Behavior Aggregate Classifier -> Input Policer -> Forwarding Policy Options -> Fabric Scheduler -> Output Policer -> Rewrite Marker -> Scheduler/Shaper/RED
  • C. Behavior Aggregate Classifier -> Input Policer -> Multifield Classifier -> Forwarding Policy Options -> Fabric Scheduler -> Output Policer -> Scheduler/Shaper/RED -> Rewrite Marker
  • D. Behavior Aggregate Classifier -> Multifield Classifier -> Input Policer -> Forwarding Policy Options -> Fabric Scheduler -> Scheduler/Shaper/RED -> Output Policer -> Rewrite Marker

Answer: C

Explanation:
Explanation
The correct order of packet flow through configurable components in the Junos OS CoS features is as follows:
* Behavior Aggregate Classifier: This component uses a single field in a packet header to classify traffic into different forwarding classes and loss priorities based on predefined or user-defined values.
* Input Policer: This component applies rate-limiting and marking actions to incoming traffic based on the forwarding class and loss priority assigned by the classifier.
* Multifield Classifier: This component uses multiple fields in a packet header to classify traffic into different forwarding classes and loss priorities based on user-defined values and filters.
* Forwarding Policy Options: This component applies actions such as load balancing, filtering, or routing to traffic based on the forwarding class and loss priority assigned by the classifier.
* Fabric Scheduler: This component schedules traffic across the switch fabric based on the forwarding class and loss priority assigned by the classifier.
* Output Policer: This component applies rate-limiting and marking actions to outgoing traffic based on the forwarding class and loss priority assigned by the classifier.
* Scheduler/Shaper/RED: This component schedules, shapes, and drops traffic at the egress interface based on the forwarding class and loss priority assigned by the classifier.
* Rewrite Marker: This component rewrites the code-point bits of packets leaving an interface based on the forwarding class and loss priority assigned by the classifier.


NEW QUESTION # 16
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