[Nov-2025] JN0-664 Exam Questions and Valid JN0-664 Dumps PDF [Q49-Q69]

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[Nov-2025] JN0-664 Exam Questions and Valid JN0-664 Dumps PDF

JN0-664 Brain Dump: A Study Guide with Tips & Tricks for passing Exam

Juniper JN0-664 (Service Provider, Professional (JNCIP-SP)) Certification Exam is a valuable certification for individuals who are interested in pursuing a career in service provider networking. It provides an opportunity to demonstrate expertise in a range of service provider networking technologies and gain recognition as a certified Juniper Networks professional.

Juniper JN0-664 (Service Provider, Professional (JNCIP-SP)) Certification Exam is a professional-level certification designed for IT professionals who work with Juniper Networks technology in a service provider environment. Service Provider, Professional (JNCIP-SP) certification exam is designed to validate the skills and knowledge required to plan, implement, and troubleshoot Junos-based service provider routing and switching networks.

Q49. CE-1 and CE-2 are part of a VPLS called Customer1. No connectivity exists between CE-1 and CE-2. In the process of troubleshooting, you notice PE-1 is not learning any routes for this VPLS from PE-2, and PE-2 is not learning any routes for this VPLS from PE-1.

Referring to the exhibit, which statement is correct?

The route target must match on PE-1 and PE-2.

The instance type should be changed to l2vpn.

The no-tunnel-services statement should be deleted on both PEs.

The route distinguisher must match on PE-1 and PE-2.

Q50. You are configuring a Layer 3 VPN between two sites. You are configuring the vrf-target target : 65100:100 statement in your routing instance.
In this scenario, which two statements describe the vrf-target configuration? (Choose two.)

This value is used to identify BGP routes learned from the local CE device.

This value is used to identify BGP routes learned from the remote PE device.

This value is used to add a target community to BGP routes advertised to the local CE device.

This value is used to add a target community to BGP routes advertised to the remote PE device.

The `vrf-target` statement in a Layer 3 VPN configuration is used to control the import and export of VPN routes by attaching a target community to the routes. This helps in defining which VPN routes should be imported into or exported from a particular VRF (Virtual Routing and Forwarding) instance.
1. **Understanding VRF Target**:
– The `vrf-target` statement specifies the extended community attributes (route targets) that are used to control the import and export of routes in a VRF.
– These attributes help in identifying which routes should be shared between different VRFs, particularly across different PE (Provider Edge) devices.
2. **Statements Analysis**:
– **A. This value is used to identify BGP routes learned from the local CE device.**
– Incorrect. The `vrf-target` attribute is not used to identify routes learned from the local CE device. It is used to manage routes between PE devices and within the provider’s MPLS network.
– **B. This value is used to identify BGP routes learned from the remote PE device.**
– Correct. The `vrf-target` value helps in identifying which routes from remote PE devices should be imported into the local VRF. It essentially acts as a filter for importing BGP routes with matching target communities.
– **C. This value is used to add a target community to BGP routes advertised to the local CE device.**
– Incorrect. Routes advertised to the local CE device do not use the `vrf-target` attribute. Instead, these routes are typically managed within the local VRF routing table.
– **D. This value is used to add a target community to BGP routes advertised to the remote PE device.**
– Correct. When advertising routes from the local PE to remote PE devices, the `vrf-target` value is added to these routes. This target community ensures that the correct routes are shared across the VPN.
**Conclusion**:
The correct statements about the `vrf-target` configuration in a Layer 3 VPN scenario are:
**B. This value is used to identify BGP routes learned from the remote PE device.**
**D. This value is used to add a target community to BGP routes advertised to the remote PE device.**
**References**:
– Juniper Networks Documentation on VRF Target: [VRF Target
Configuration](https://www.juniper.net/documentation/en_US/junos/topics/topic-map/layer-3-vpns.html)
– MPLS and VPN Architectures by Ivan Pepelnjak and Jim Guichard

Q51. Exhibit

You must ensure that the VPN backbone is preferred over the back door intra-area link as long as the VPN is available. Referring to the exhibit, which action will accomplish this task?

Configure an import routing policy on the CE routers that rejects OSPF routes learned on the backup intra-area link.

Enable OSPF traffic-engineering.

Configure the OSPF metric on the backup intra-area link that is higher than the L3VPN link.

Create an OSPF sham link between the PE routers.

Q52. A router running IS-IS is configured with an ISO address of 49.0001.00a0.c96b.c490.00.
Which part of this address is the system ID?

00a0.c96b.c490 is the system identifier.

0001.00a0.c96b.c490 is the system identifier.

c96b.c490 is the system identifier.

c490 is the system identifier.

Q53. Exhibit

A network designer would like to create a summary route as shown in the exhibit, but the configuration is not working.
Which three configuration changes will create a summary route? (Choose three.)

set policy-options policy-statement leak-v6 term DC-routes then reject

delete policy-options policy-statement leak-v6 term DC-routes from route-filter 2001: db9 :a: fa00 : :/6l longer

set policy-options policy-statement leak-v6 term DC-routes from route-filter 2001:db9:a:faOO::/61 exact

delete protocols isis export summary-v6

set protocols isis import summary-v6

Q54. Refer to the exhibit.

Click the Exhibit button.
Referring to the exhibit, which two statements are correct about BGP routes on R3 that are advertised to R1? (Choose two.)

By default, the next-hop value for these routes is changed by R3 before being sent to R1.

By default, all BGP attributes values must be removed before advertising the routes to R1.

By default, the BGP local-preference value that is assigned on R3 is advertised to R1.

By default, the next-hop value for these routes is not changed by R3 before being sent to R1.

Q55. Exhibit.

Referring to the exhib.t, what must be changed to establish a Level 1 adjacency between routers R1 and R2?

Change the level l disable parameter under the R1 protocols isis interface lo0.0 hierarchy to the level 2 disable parameter.

Remove the level i disable parameter under the R2 protocols isis interface loo . 0 configuration hierarchy.

Change the level 1 disable parameter under the R2 protocols isis interface ge-1/2/3 .0 hierarchy to the level 2 disable parameter

Add IP addresses to the interface ge-l/2/3 unit 0 family iso hierarchy on both R1 and R2.

Q56. Which statement is true regarding BGP FlowSpec?

It is used to protect a network from denial-of-service attacks dynamically.

It uses dynamically created routing policies to protect a network from denial-of-service attacks.

It uses a remote triggered black hole to protect a network from a denial-of-service attack.

It verifies that the source IP of the incoming packet has a resolvable route in the routing table.

Q57. Which statement is correct about IS-IS when it performs the Dijkstra algorithm?

The local router moves its own local tuples into the candidate database

When a new neighbor ID in the tree database matches a router ID in the LSDB, the neighbor ID is moved to the candidate database

The algorithm will stop processing once the tree database is empty.

Tuples with the lowest cost are moved from the tree database to the LSDB.

Q58. You are configuring a BGP signaled Layer 2 VPN across your MPLS enabled core network. In this scenario, which statement is correct?

You must assign a unique site number to each attached site’s configuration.

This type of VPN only supports Ethernet interfaces when connecting to CE devices.

This type of VPN requires the support of the inet-vpn NLRI on all core BGP devices

You must use the same route-distinguiaher value on both PE devices.

Q59. Exhibit

You have MAC addresses moving in your EVPN environment
Referring to the exhibit, which two statements are correct about the sequence number? (Choose two)

It identifies MAC addresses that should be discarded.

It resolves conflicting MAC address ownership claims.

It helps the local PE to identify the latest advertisement.

It is advertised using a Type 2 message

Q60. Exhibit

Referring to the exhibit, CE-1 is providing NAT services for the hosts at Site 1 and you must provide Internet access for those hosts Which two statements are correct in this scenario? (Choose two.)

You must configure a static route in the main routing instance for the 10 1 2.0/24 prefix that uses the VPN-A.inet.0 table as the next hop

You must configure a static route in the main routing instance for the 203.0.113.1/32 prefix that uses the VPN-A.inet.0 table as the next hop.

You must configure a RIB group on PE-1 to leak a default route from the inet.0 table to the VPN-A.inet.
0 table.

You must configure a RIB group on PE-1 to leak the 10 1 2.0/24 prefix from the VPN-A.inet.0 table to the inet.0 table.

Q61. You have an L2VPN connecting two CEs across a provider network. The CEs and provider network are configured with the default MTU setting. You use the ping command from one CE to the other CE with a size of 1500 bytes.
In this scenario, which statement is correct when using the ping command?

You expect the ping results to be fragmented.

You expect a silent discard.

You expect an echo reply.

You expect an ICMP message too long error.

Q62. Referring to the exhibit, which statement is correct?

VPN routes are exported with the target:65512:1 and target:65512:2 route targets.

You cannot use the vrf-target and vrf-export statements in the same VRF.

VPN routes with the target:65512:1 and target:65512:2 route targets are imported.

VPN routes are exported with only the target:65512:1 route target

Q63. An interface is configured with a behavior aggregate classifier and a multifield classifier How will the packet be processed when received on this interface?

The packet will be discarded.

The packet will be processed by the BA classifier first, then the MF classifier.

The packet will be forwarded with no classification changes.

The packet will be processed by the MF classifier first, then the BA classifier.

Explanation
behavior aggregate (BA) classifiers and multifield (MF) classifiers are two types of classifiers that are used to assign packets to a forwarding class and a loss priority based on different criteria. The forwarding class determines the output queue for a packet. The loss priority is used by a scheduler to control packet discard during periods of congestion.
A BA classifier maps packets to a forwarding class and a loss priority based on a fixed-length field in the packet header, such as DSCP, IP precedence, MPLS EXP, or IEEE 802.1p CoS bits. A BA classifier is computationally efficient and suitable for core devices that handle high traffic volumes. A BA classifier is useful if the traffic comes from a trusted source and the CoS value in the packet header is trusted.
An MF classifier maps packets to a forwarding class and a loss priority based on multiple fields in the packet header, such as source address, destination address, protocol type, port number, or VLAN ID. An MF classifier is more flexible and granular than a BA classifier and can match packets based on complex filter rules. An MF classifier is suitable for edge devices that need to classify traffic from untrusted sources or rewrite packet headers.
You can configure both a BA classifier and an MF classifier on an interface. If you do this, the BA classification is performed first and then the MF classification. If the two classification results conflict, the MF classification result overrides the BA classification result.
Based on this information, we can infer the following statements:
* The packet will be discarded. This is not correct because the packet will not be discarded by the classifiers unless it matches a filter rule that specifies discard as an action. The classifiers only assign packets to a forwarding class and a loss priority based on their match criteria.
* The packet will be processed by the BA classifier first, then the MF classifier. This is correct because if both a BA classifier and an MF classifier are configured on an interface, the BA classification is performed first and then the MF classification. If they conflict, the MF classification result overrides the BA classification result.
* The packet will be forwarded with no classification changes. This is not correct because the packet will be classified by both the BA classifier and the MF classifier if they are configured on an interface. The final classification result will determine which output queue and which discard policy will be applied to the packet.
* The packet will be processed by the MF classifier first, then the BA classifier. This is not correct because if both a BA classifier and an MF classifier are configured on an interface, the BA classification is performed first and then the MF classification. If they conflict, the MF classification result overrides the BA classification result.

Q64. Exhibit

Based on the configuration contents shown in the exhibit, which statement is true?

Joins for group 224.7.7.7 are rejected if the source address is 192.168.100.10

Joins for any group are accepted if the group count value is less than 25.

Joins for group 224.7.7.7 are always rejected, regardless of the group count.

Joins for group 224.7.7.7 are accepted if the group count is less than 25

Q65. You have an L2VPN connecting two CEs across a provider network that runs OSPF. You have OSPF configured on both CEs.
Which two statements are correct in this scenario? (Choose two.)

OSPF neighborship is formed between the CEs and PEs.

The CE and PE OSPF areas can be different.

The CE and PE OSPF areas must match.

OSPF neighborship is formed between the two CEs.

Q66. You are configuring a BGP signaled Layer 2 VPN across your MPLS enabled core network. In this scenario, which statement is correct?

You must assign a unique site number to each attached site’s configuration.

This type of VPN only supports Ethernet interfaces when connecting to CE devices.

This type of VPN requires the support of the inet-vpn NLRI on all core BGP devices

You must use the same route-distinguiaher value on both PE devices.

Q67. Your network is receiving the 203.0.113.0/24 network using EBGP from AS 64500 and AS 64501. Both of these advertisements have identical local-preference values, AS-path lengths, and BGP origin codes. You want to influence the way your AS sends traffic to the 203.0.113.0/24 network.
In this scenario, which attribute would you consider next when selecting the best path?

router ID

MED value

peer IP address

IGP metric

Q68. 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.)

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.

On R4, create a policy to change the BGP next hop to itself and apply it to IBGP as an export policy.

On R4, add the internal IBGP interface prefixes to the BGP routing tables.

On R4, add the external EBGP interface’s prefix to the IGP routing tables.

Q69. Which two EVPN route types are used to advertise a multihomed Ethernet segment? (Choose two )

Type 1

Type 3

Type 4

Type 2

JN0-664 Exam Questions: Free PDF Download Recently Updated Questions: https://www.prepawaypdf.com/Juniper/JN0-664-practice-exam-dumps.html

[Nov-2025] JN0-664 Exam Questions and Valid JN0-664 Dumps PDF [Q49-Q69]

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