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Juniper JN0-664 Reliable Learning Materials, Latest JN0-664 Mock Test

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The JN0-664 exam is a challenging exam that requires a deep understanding of Juniper Networks technologies and their applications in service provider environments. It is designed to test the skills and knowledge of professionals who work with Juniper Networks technologies on a daily basis and who are responsible for maintaining and troubleshooting complex service provider networks.

The JN0-664 exam covers a wide range of topics, including OSPF, IS-IS, BGP, MPLS, Layer 3 VPNs, Layer 2 VPNs, Class of Service, and IP multicast. JN0-664 Exam consists of 65 multiple-choice questions that need to be completed within 120 minutes. JN0-664 exam is computer-based, and the passing score is 65%. Candidates who pass the JN0-664 exam will be awarded the Juniper Networks Certified Professional Service Provider (JNCIP-SP) certification.

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Juniper Service Provider, Professional (JNCIP-SP) Sample Questions (Q21-Q26):

NEW QUESTION # 21
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 MSDP on each RP router.
B. Configure anycast PIM with the rp-set statement on each RP router.
C. Configure anycast PIM with the rp-set statement on each source DR router.
D. Configure MSDP on each source DR router.

Answer: A,B

Explanation:
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.

NEW QUESTION # 22

Click the Exhibit button.
You are troubleshooting an issue for a customer site that uses 10.10.0.0/24 in AS 65224, but you see another AS in the AS path.
Referring to the exhibit, what is the cause of the problem?

A. The local AS is in the process of withdrawing the route from AS 65137.
B. AS 65000 is pre-pending AS 65137 to route advertisements.
C. The local AS is receiving two equal cost routes to 10.10.0.0/24.
D. AS 65137 is advertising the 10.10.0.0/24 prefix.

Answer: D

NEW QUESTION # 23
Exhibit

Referring to the exhibit, which two statements are true? (Choose two.)

A. This is an EVPN Type-2 route.
B. The devices advertising this route into EVPN are 10 0 2 12 and 10.0.2.22.
C. The device advertising this route into EVPN is 192.168.101.5.
D. This route is learned through EBGP

Answer: A,C

Explanation:
Explanation
This is an EVPN Type-2 route, also called a MAC/IP advertisement route, that is used to advertise host IP and MAC address information to other VTEPs in an EVPN network. The route type field in the EVPN NLRI has a value of 2, indicating a Type-2 route. The device advertising this route into EVPN is 192.168.101.5, which is the IP address of the VTEP that learned the host information from the local CE device. This IP address is carried in the MPLS label field of the route as part of the VXLAN encapsulation.

NEW QUESTION # 24
Exhibit.

Referring to the exhibit; the 10.0.0.0/24 EBGP route is received on R5; however, the route is being hidden.
What are two solutions that will solve this problem? (Choose two.)

A. On R4, create a policy to change the BGP next hop to itself and apply it to IBGP as an export policy
B. On R4, create a policy to change the BGP next hop to 172.16.1.1 and apply it to IBGP as an export policy
C. Add the external interface prefix to the IGP routing tables
D. Add the internal interface prefix to the BGP routing tables.

Answer: A,C

Explanation:
the default behavior for iBGP is to propagate EBGP-learned prefixes without changing the next-hop. This can cause issues if the next-hop is not reachable via the IGP. One solution is to use the next-hop self command on R4, which will change the next-hop attribute to its own loopback address. This way, R5 can reach the next-hop via the IGP and install the route in its routing table.
Another solution is to add the external interface prefix (120.0.4.16/30) to the IGP routing tables of R4 and R5.
This will also make the next-hop reachable via the IGP and allow R5 to use the route. According to 2, this is a possible workaround for a pure IP network, but it may not work well for an MPLS network.
The reason why the route is being hidden is that R5 cannot reach the BGP next hop 10.0.0.1, which is the address of R1. R5 does not have a route to 10.0.0.0/24 in its routing table, and neither does R4. Therefore, R5 cannot resolve the BGP next hop and marks the route as hidden.
There are two solutions that will solve this problem:
Option A: On R4, create a policy to change the BGP next hop to itself and apply it to IBGP as an export policy. This way, R5 will receive the route with a next hop of 172.16.1.2, which is reachable via the IGP. This solution is also known as next-hop-self1.
Option B: Add the external interface prefix to the IGP routing tables. This way, R4 and R5 will learn a route to 10.0.0.0/24 via the IGP and be able to resolve the BGP next hop. This solution is also known as recursive lookup2.
Option C is not correct because adding the internal interface prefix to the BGP routing tables will not help R5 reach the BGP next hop 10.0.0.1.
Option D is not correct because changing the BGP next hop to 172.16.1.1 on R4 will not help R5 either, since R5 does not have a route to 172.16.1.1 in its routing table.
References: 1: Configuring Next-Hop-Self for IBGP Peers 2: Understanding Recursive Lookup

NEW QUESTION # 25
Which two statements are correct about reflecting inet-vpn unicast prefixes in BGP route reflection? (Choose two.)

A. Route reflectors add their cluster ID to the AS path when readvertising client routes.
B. A BGP peer does not require any configuration changes to become a route reflector client.
C. Clients add their originator ID when advertising routes to their route reflector
D. Route reflectors do not change any existing BGP attributes by default when advertising routes.

Answer: B,D

Explanation:
Route reflection is a BGP feature that allows a router to reflect routes learned from one IBGP peer to another IBGP peer, without requiring a full-mesh IBGP topology. Route reflectors do not change any existing BGP attributes by default when advertising routes, unless explicitly configured to do so. A BGP peer does not require any configuration changes to become a route reflector client, only the route reflector needs to be configured with the client parameter under [edit protocols bgp group group-name neighbor neighbor-address] hierarchy level.

NEW QUESTION # 26
......

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