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JN0-664 Examcollection, JN0-664 Official Study Guide

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The JN0-664 Exam is a comprehensive test that requires a solid understanding of service provider routing and switching. To prepare for JN0-664 exam, candidates should have hands-on experience with Juniper Networks' service provider routing and switching platforms. Additionally, candidates are encouraged to take advantage of Juniper Networks' training resources, including online courses, virtual labs, and instructor-led training.

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The JN0-664 certification exam is intended for individuals who have a solid understanding of networking technologies and who have experience working with Juniper Networks service provider routing and switching technologies. Candidates who pass the JN0-664 certification exam will have demonstrated their ability to plan, implement, and troubleshoot complex routing and switching scenarios in service provider environments.

The JN0-664 Certification Exam is a professional level exam, which means that it is intended for individuals who have a significant amount of experience in the service provider industry. JN0-664 exam consists of 65 multiple-choice questions, and individuals are allotted 120 minutes to complete the exam. The passing score for the JN0-664 exam is 65%, and individuals who pass the exam will receive the JNCIP-SP certification.

Juniper Service Provider, Professional (JNCIP-SP) Sample Questions (Q31-Q36):

NEW QUESTION # 31
In which two ways does OSPF prevent routing loops in multi-area networks? (Choose two.)

A. All areas are required to connect as a full mesh.
B. All areas are required to connect to area 0.
C. The SPF algorithm prunes looped paths within an area.
D. The LFA algorithm prunes all looped paths within an area.

Answer: B,C

Explanation:
Explanation
OSPF is an interior gateway protocol that uses link-state routing to exchange routing information among routers within a single autonomous system. OSPF prevents routing loops in multi-area networks by using two methods: area hierarchy and SPF algorithm. Area hierarchy is the concept of dividing a large OSPF network into smaller areas that are connected to a backbone area (area 0). This reduces the amount of routing information that each router has to store and process, and also limits the scope of link-state updates within each area. All areas are required to connect to area 0 either directly or through virtual links2. SPF algorithm is the method that OSPF uses to calculate the shortest path to each destination in the network based on link-state information. The SPF algorithm runs on each router and builds a shortest-path tree that represents the topology of the network from the router's perspective. The SPF algorithm prunes looped paths within an area by choosing only one best path for each destination3.
References: 2:
https://www.juniper.net/documentation/us/en/software/junos/ospf/topics/concept/ospf-area-overview.html 3:
https://www.juniper.net/documentation/us/en/software/junos/ospf/topics/concept/ospf-spf-algorithm-overview.ht

NEW QUESTION # 32
Which three mechanisms are used by Junos platforms to evaluate incoming traffic for CoS purposes? (Choose three )

A. rewrite rules
B. fixed classifiers
C. traffic shapers
D. multifield classifiers
E. behavior aggregate classifiers

Answer: B,D,E

Explanation:
Junos platforms use different mechanisms to evaluate incoming traffic for CoS purposes, such as:
Behavior aggregate classifiers: These classifiers use a single field in a packet header to classify traffic into different forwarding classes and loss priorities based on predefined or user-defined values.
Fixed classifiers: These classifiers use a fixed field in a packet header to classify traffic into different forwarding classes and loss priorities based on predefined values.
Multifield classifiers: These classifiers use multiple fields in a packet header to classify traffic into different forwarding classes and loss priorities based on user-defined values and filters.
Rewrite rules and traffic shapers are not used to evaluate incoming traffic for CoS purposes, but rather to modify or shape outgoing traffic based on CoS policies.

NEW QUESTION # 33
Exhibit

Referring to the exhibit, you must provide Internet access for VPN-A using CE-1 as the hub CE.
Which two statements are correct in this situation? (Choose two.)

A. Internet traffic from Site 2 takes the path of PE-2 -> PE-1 -> GW-1.
B. RIB groups are not needed to leak routes between the inet. 0 and VPN-A. inet. 0 tables,
C. Internet traffic from Site 2 takes the path of PE-2 -> PE-1 -> CE-1 -> PE-1 -> GW-1.
D. You must use RIB groups to leak routes between the inet. o and vpn-a. inet. o tables.

Answer: B,C

NEW QUESTION # 34
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.0 resolution-ribs inet.0 statement on the RR.
B. Configure the family route-target statement on the RR.
C. Configure the family route-target statement on the PEs.
D. Configure the resolution rib bgp.l3vpn.0 resolution-ribs inet.0 statement on the PEs.

Answer: A,B

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 # 35
Which statement is true regarding BGP FlowSpec?

A. It uses a remote triggered black hole to protect a network from a denial-of-service attack.
B. It verifies that the source IP of the incoming packet has a resolvable route in the routing table.
C. It is used to protect a network from denial-of-service attacks dynamically.
D. It uses dynamically created routing policies to protect a network from denial-of-service attacks.

Answer: C

NEW QUESTION # 36
......

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