JN0-664 Dump Free – 50 Practice Questions to Sharpen Your Exam Readiness.
Looking for a reliable way to prepare for your JN0-664 certification? Our JN0-664 Dump Free includes 50 exam-style practice questions designed to reflect real test scenarios—helping you study smarter and pass with confidence.
Using an JN0-664 dump free set of questions can give you an edge in your exam prep by helping you:
- Understand the format and types of questions you’ll face
- Pinpoint weak areas and focus your study efforts
- Boost your confidence with realistic question practice
Below, you will find 50 free questions from our JN0-664 Dump Free collection. These cover key topics and are structured to simulate the difficulty level of the real exam, making them a valuable tool for review or final prep.
By default, which statement is correct about OSPF summary LSAs?A. The metric associated with a summary route will be equal to the lowest metric associated with an individual contributing route.
B. The area-range command must be installed on all routers.
C. Type 3 LSAs are advertised for routes in Type 1 LSAs.
D. All Type 2 and Type 7 LSAs will be summarized into a single Type 5 LSA.
Â
Which two statements about IS-IS are correct? (Choose two.)A. CSNPs are used to request a missing LSP.
B. PSNPs are used to acknowledge a received LSP.
C. PSNPs are used to request a missing LSP.
D. CSNPs are used to acknowledge a received LSP.
Â
Click the Exhibit button.
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. Internet traffic from Site 2 takes the path of PE-2 -> PE-1 -> CE-1 -> PE-1 -> GW-1.
C. You must use RIB groups to leak routes between the inet.0 and VPN-A.inet.0 tables.
D. RIB groups are not needed to leak routes between the inet.0 and VPN-A.inet.0 tables.
Â
When using 0SPFv3 for an IPv4 environment, which statement is correct?A. OSPFv3 only supports IPv4.
B. OSPFv3 is not backward compatible with IPv4.
C. OSPFv3 supports both IPv6 and IPv4, but not in the same routing instance.
D. OSPFv3 supports IPv4 only on interfaces with family inet6 defined.
Â
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 exceeding queue will be considered to have negative bandwidth credit.
B. The excess traffic will be discarded.
C. The exceeding queue will be considered to have positive bandwidth credit.
D. The excess traffic will use bandwidth available from other queues.
Â
Click the Exhibit button.
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 172.16.1.1 and apply it to IBGP as an export policy.
B. On R4, create a policy to change the BGP next hop to itself and apply it to IBGP as an export policy.
C. On R4, add the internal IBGP interface prefixes to the BGP routing tables.
D. On R4, add the external EBGP interface's prefix to the IGP routing tables.
Â
Click the Exhibit button.
Which two statements are correct about the class-of-service configuration shown in the exhibit? (Choose two.)A. The drop probability jumps immediately from 20% to 60% when the queue level reaches 75% full.
B. To use this drop profile, you reference it in a scheduler.
C. The drop probability gradually increases from 20% to 60% as the queue level increases from 50% full to 75% full.
D. To use this drop profile, you apply it directly to an interface.
Â
Click the Exhibit button.
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?A. Enable OSPF traffic-engineering.
B. Configure an import routing policy on the CE routers that rejects OSPF routes learned on the backup intra-area link.
C. Create an OSPF sham link between the PE routers.
D. Configure the OSPF metric on the backup intra-area link that is higher than the L3VPN link.
Â
You are configuring a BGP signaled Layer 2 VPN across your MPLS enabled core network. Your PE-2 device connects to two sites within the same VPN.
In this scenario, which statement is correct?A. You must create a unique Layer 2 VPN routing instance for each site on the PE-2 device.
B. By default on PE-2, the site’s local ID is automatically assigned a value of 0 and must be configured to match the total number of attached sites.
C. You must use separate physical interfaces to connect PE-2 to each site.
D. By default on PE-2, the remote site IDs are automatically assigned based on the order that you add the interfaces to the site configuration.
Â
Click the Exhibit button.
Referring to the exhibit, which two statements are correct about BGP routes on R3 that are learned from the ISP-A neighbor? (Choose two.)A. The next-hop value for these routes Is changed by ISP-A before being sent to R3.
B. All BGP attribute values must be removed before receiving the routes.
C. The BGP local-preference value that is used by ISP-A is not advertised to R3.
D. By default, the next-hop value for these routes is not changed by ISP-A before being sent to R3.
Â
Click the Exhibit button.
R1 and R8 are not receiving each other's routes.
Referring to the exhibit, what are three configuration commands that would solve this problem? (Choose three.)A. Configure remove-private on advertisements from AS 64497 toward AS 64498.
B. Configure as-override on advertisement from AS 64500 toward AS 64512.
C. Configure remove-private on advertisements from AS 64500 toward AS 64499.
D. Configure loops and advertise-peer-as on routers in AS 64497 and AS 64450.
E. Configure loops on routers in AS 65412 and advertise-peer-as on routers in AS 64498.
Â
Click the Exhibit button.
Referring to the exhibit, which two statements are correct regarding the output shown in the exhibit? (Choose two.)A. The multicast group is an ASM group.
B. The multicast group is an SSM group.
C. The multicast traffic is using the SPT.
D. The multicast traffic is using the RPT.
Â
Click the Exhibit button.
You are troubleshooting the connection between AS 64496 and AS 64497 and notice that only one of the paths is being used for traffic forwarding.
Referring to the exhibit, which three actions will ensure that R1 is configured properly for load balancing BGP routes? (Choose three.)A. Verify that the routing table on R1 has BGP routes for 203.0.113.128/25 with multiple next hops.
B. Verify that the multipath option is configured under protocols bgp on both R2 and R3.
C. Verify that there is a load balancing export policy under routing-options for the received BGP routes on R1.
D. Verify that the multipath option is configured under protocols bgp on R1.
E. Verify that an import load balancing policy exists under protocols bgp for the received BGP routes on R1.
Â
Click the Exhibit button.
PE-1 and PE-2 are configured with LDP-signaled pseudowires to provide connectivity between CE-1 and CE-2. You notice no connectivity exists between CE-1 and CE-2.
Referring to the exhibit, which two statements describe potential causes for this fault? (Choose two.)A. There is no LSP configured from PE-1 to PE-2.
B. Interface ge-0/0/0 on PE-1 is down.
C. The VC IDs are mismatched.
D. There is no LSP configured from PE-2 to PE-1.
Â
Which origin code is preferred by BGP?A. Internal
B. External
C. Incomplete
D. Null
Â
Click the Exhibit button.
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 PEs.
B. Configure the family route-target statement on the RR.
C. Configure the resolution rib bgp.l3vpn.0 resolution-ribs inet.0 statement on the RR.
D. Configure the family route-target statement on the PEs.
Â
Click the Exhibit button.
The network shown in the exhibit is based on IS-IS.
Which statement is correct in this scenario?A. The routers are using unnumbered interfaces.
B. The system ID of R1_2 is 192.168.16.1.
C. The NSEL byte for Area 0001 is 00.
D. The area address is two bytes.
Â
Which two EVPN route types are used to advertise a multihomed Ethernet segment? (Choose two.)A. Type 2
B. Type 4
C. Type 3
D. Type 1
Â
Which two statements about IS-IS are correct? (Choose two.)A. CSNPs are flooded periodically.
B. PSNPs are flooded periodically.
C. PSNPs contain only descriptions of LSPs.
D. CSNPs contain only descriptions of LSPs.
Â
You are responding to an RFP for a new MPLS VPN implementation. The solution must use LDP for signaling and support Layer 2 connectivity without using BGP. The solution must be scalable and support multiple VPN connections over a single MPLS LSP. The customer wants to maintain all routing for their private network.
In this scenario, which solution do you propose?A. circuit cross-connect
B. BGP Layer 2 VPN
C. LDP Layer 2 circuit
D. translational cross-connect
Â
Click the Exhibit button.
You want to use both links between R1 and R2. Because of the bandwidth difference between the two links, you must ensure that the links are used as much as possible.
Which action will accomplish this goal?A. Ensure that the metric-out parameter on the Gigabit Ethernet interface is higher than the 10 Gigibit Ethernet interface.
B. Define a policy to tag routes with the appropriate bandwidth community.
C. Enable per-prefix load balancing.
D. Disable multipath.
Â
Click the Exhibit button.
Which two statements are correct about the class-of-service configuration shown in the exhibit? (Choose two.)A. Incoming traffic will be classified using the default classifier.
B. The best-effort queue can never transmit more than 40% of the total bandwidth on the ge-0/0/0 interface, even if that bandwidth is available.
C. Incoming traffic will not be classified because no classifier exists in the configuration.
D. The best-effort queue can transmit more than 40% of the total bandwidth on the ge-0/0/0 interface, if no other queue is using that bandwidth.
Â
Click the Exhibit button.
You want Site 1 to access three VLANs that are located in Site 2 and Site 3. The customer-facing interface on the PE-1 router is configured for Ethernet-VLAN encapsulation.
What is the minimum number of L2VPN routing instances to be configured to accomplish this task?A. 1
B. 2
C. 3
D. 6
Â
Click the Exhibit button.
Referring to the exhibit, which two statements are true? (Choose two.)A. The devices advertising this route into EVPN are 10.0.2.12 and 10.0.2.22.
B. This route is learned through EBGP.
C. The device advertising this route into EVPN is 192.168.101.5.
D. This is an EVPN Type-2 route.
Â
Click the Exhibit button.
You have MAC addresses moving in your EVPN environment.
Referring to the exhibit, which two statements are correct about the sequence number? (Choose two.)A. It identifies MAC addresses that should be discarded.
B. It resolves conflicting MAC address ownership claims.
C. It is advertised using a Type 2 message.
D. It helps the local PE to identify the latest advertisement.
Â
Click the Exhibit button.
You have an OSPF environment. You have recently added a router called R4 that is directly connected to R1 and R2. You discover that R4 is only peering with R2.
Referring to the exhibit, how would you correct the peering?A. Adjust the Hello Interval on R1 and R2 to match the Hello Interval on R4.
B. Change the MTU size on R1 and R2 to be 22 bytes higher than R4's MTU size.
C. Adjust the Dead Interval on R4 to match the Dead Interval on R1 and R2.
D. Adjust the Priority on R1 to be lower than the Priority on R4.
Â
Click the Exhibit button.
Referring to the exhibit, a working L3VPN exists that connects VPN-A sites. CoS is configured correctly to match on the MPLS EXP bits of the LSP. but when traffic is sent from Site-1 to Site-2. PE-2 is not classifying the traffic correctly.
What should you do to solve the problem?A. Configure VPN prefix mapping for the PE-1_to_PE-2 LSP.
B. Set a static CoS value for the PE-1_to_PE-2 LSP.
C. Configure the explicit-null statement on PE-2.
D. Configure the explicit-null statement on PE-1.
Â
Click the Exhibit button.
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 1 route distinguisher.
C. The information shows a Type 0 route distinguisher.
D. The information shows a Type 2 route distinguisher.
Â
Click the Exhibit button.
R2 is receiving the same route from R1 and R3. You must ensure that you can load balance traffic for that route.
Referring to the exhibit, which configuration change will allow load balancing?A. Configure the multipath parameter under the global BGP configuration.
B. Apply the prepend policy as an import policy under group R1.
C. Configure the multipath multiple-as parameter under the global BGP configuration.
D. Apply the prepend policy as an import policy under group R3.
Â
Which statement is true regarding BGP FlowSpec?A. It is used to protect a network from denial-of-service attacks dynamically.
B. It uses dynamically created routing policies to protect a network from denial-of-service attacks.
C. It uses a remote triggered black hole to protect a network from a denial-of-service attack.
D. It verifies that the source IP of the incoming packet has a resolvable route in the routing table.
Â
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. AS 65000 is pre-pending AS 65137 to route advertisements.
B. The local AS is in the process of withdrawing the route from AS 65137.
C. AS 65137 is advertising the 10.10.0.0/24 prefix.
D. The local AS is receiving two equal cost routes to 10.10.0.0/24.
Â
Click the Exhibit button.
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?A. The route target must match on PE-1 and PE-2.
B. The instance type should be changed to l2vpn.
C. The no-tunnel-services statement should be deleted on both PEs.
D. The route distinguisher must match on PE-1 and PE-2.
Â
Click the Exhibit button.
You are attempting to summarize routes from the 203.0.113.128/25 IP block on R8 to AS 64500. You implement the export policy shown in the exhibit and all routes from the routing table stop being advertised.
In this scenario, which two steps would you take to summarize the route in BGP? (Choose two.)A. Replace exact in the export policy with orlonger.
B. Remove the from protocol bgp command from the export policy.
C. Add the set protocols bgp family inet unicast add-path command to allow additional routes to the RIB tables.
D. Add the set routing-options aggregate route 203.0.113.128/25 command.
Â
Which statement is correct about IS-IS when it performs the Dijkstra algorithm?A. The local router moves its own local tuples into the candidate database.
B. When a new neighbor ID in the tree database matches a router ID in the LSDthe neighbor ID is moved to the candidate database.
C. Tuples with the lowest cost are moved from the tree database to the LSDB.
D. The algorithm will stop processing once the tree database is empty.
Â
Click the Exhibit button.
Which two statements about the output shown in the exhibit are correct? (Choose two.)A. The connection has not flapped since it was initiated.
B. The PE is attached to a single local site.
C. There has been a VLAN ID mismatch.
D. The PE router has the capability to pop flow labels.
Â
You are configuring a BGP signaled Layer 2 VPN across your MPLS enabled core network.
In this scenario, which statement is correct?A. You must use the same route-distinguisher value on both PE devices.
B. You must assign a unique site number to each attached site's configuration.
C. This type of VPN only supports Ethernet interfaces when connecting to CE devices.
D. This type of VPN requires the support of the inet-vpn NLRI on all core BGP devices.
Â
Click the Exhibit button.
Referring to the exhibit, what must be changed to establish a Level 1 adjacency between routers R1 and R2?A. Change the level l disable parameter under the R1 protocols isis interface lo0.0 hierarchy to the level 2 disable parameter.
B. Add IP addresses to the interface ge-1/2/3 unit 0 family iso hierarchy on both R1 and R2.
C. Remove the level 1 disable parameter under the R2 protocols isis interface lo0.0 configuration hierarchy.
D. Change the level 1 disable parameter under the R2 protocols isis interface ge-l/2/3.0 hierarchy to the level 2 disable parameter.
Â
Click the Exhibit button.
You are asked to exchange routes between R1 and R4 as shown in the exhibit. These two routers use the same AS number.
Which two steps will accomplish this task? (Choose two.)A. Configure the BGP group with the advertise-peer-as parameter on R2 and R3.
B. Configure the BGP group with the as-override parameter on R1 and R4.
C. Configure the BGP group with the advertise-peer-as parameter on R1 and R4.
D. Configure the BGP group with the as-override parameter on R2 and R3.
Â
Click the Exhibit button.
Based on the configuration contents shown in the exhibit, which statement is true?A. Joins for group 224.7.7.7 are rejected if the source address is 192.168.100.10.
B. Joins for group 224.7.7.7 are always rejected, regardless of the group count.
C. Joins for group 224.7.7.7 are accepted if the group count is less than 25.
D. Joins for any group are accepted if the group count value is less than 25.
Â
Click the Exhibit button.
Referring to the exhibit. PIM-SM is configured on all routers, and Anycast-RP with Anycast-PIM is used for the discovery mechanism on RP1 and RP2. The interface metric values are shown for the OSPF area.
In this scenario, which two statements are correct about which RP is used? (Choose two.)A. Source2 will use RP1 and Receiver2 will use RP1 for group 224.2.2.2.
B. Source2 will use RP2 and Receiver2 will use RP2 for group 224.2.2.2.
C. Source1 will use RP1 and Receiver1 will use RP1 for group 224.1.1.1.
D. Source1 will use RP1 and Receiver1 will use RP2 for group 224.1.1.1.
Â
Click the Exhibit button.
You want to implement the BGP Generalized TTL Security Mechanism (GTSM) on the network.
Which three statements are correct in this scenario? (Choose three.)A. BGP GTSM requires a TTL of 1 to be configured between neighbors.
B. You can implement BGP GTSM between R2, R3, and R4.
C. You can implement BGP GTSM between R2 and R1.
D. BGP GTSM requires a firewall filter to discard packets with incorrect TTL.
E. BGP GTSM requires a TTL of 255 to be configured between neighbors
Â
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.)A. OSPF neighborship is formed between the CEs and PEs.
B. OSPF neighborship is formed between the two CEs.
C. The CE and PE OSPF areas must match.
D. The CE and PE OSPF areas can be different.
Â
Click the Exhibit button.
You are running a service provider network and must transport a customer's IPv6 traffic across your IPv4-based MPLS network using BGP. You have already configured mpls ipv6-tunneling on your PE routers.
Which two statements are correct about the BGP configuration in this scenario? (Choose two.)A. You must configure family inet6 labeled-unicast between PE routers.
B. You must configure family inet6 add-path between PE and CE routers.
C. You must configure family inet6 unicast between PE and CE routers.
D. You must configure family inet6 unicast between PE routers.
Â
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 LFA algorithm prunes all looped paths within an area.
D. The SPF algorithm prunes looped paths within an area.
Â
You are a network architect for a service provider and want to offer Layer 2 services to your customers. You want to use EVPN for Layer 2 services in your existing MPLS network.
Which two statements are correct in this scenario? (Choose two.)A. Segment routing must be configured on all PE routers.
B. EVPN uses Type 2 routes to advertise MAC address and IP address pairs learned using ARP snooping.
C. EVPN uses Type 3 routes to join a multicast tree to flood traffic.
D. VXLAN must be configured on all PE routers.
Â
Click the Exhibit button.
You enabled a new router (R3) in your network but all destinations using IS-IS routes are not properly load balancing over this new router.
Referring to the exhibit, what is the problem?A. R2 is missing internal routes for R1.
B. R1 is missing internal routes for R2.
C. R3 does not have wide-metrics enabled.
D. R1 does not have wide-metrics enabled.
Â
Click the Exhibit button.
R4 is directly connected to both RPs (R2 and R3). R4 is currently sending all joins 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 local address on R2 to be higher than R3.
C. Change the default route in inet.2 on R4 from R3 as the next hop to R2.
D. Change the group-range to be more specific on R2 than R3.
Â
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. output policer
B. scheduler
C. rewrite rules
D. forwarding classes
Â
What is the correct order of packet flow through configurable components in the Junos OS CoS features?A. Multifield Classifier -> Behavior Aggregate Classifier -> Input Policer -> Forwarding Policy Options -> Fabric Scheduler -> Output Policer -> Rewrite Marker -> Scheduler/Shaper/RED
B. Behavior Aggregate Classifier -> Multifield Classifier -> Input Policer -> Forwarding Policy Options -> Fabric Scheduler -> Output Policer -> Scheduler/Shaper/RED -> Rewrite Marker
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
Â
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. On the multi-access network, each router only forms an adjacency to the DIS.
C. A router with a priority of 1 wins the DIS election over a router with a priority of 10.
D. A router with a priority of 10 wins the DIS election over a router with a priority of 1.
Â
Access Full JN0-664 Dump Free
Looking for even more practice questions? Click here to access the complete JN0-664 Dump Free collection, offering hundreds of questions across all exam objectives.
We regularly update our content to ensure accuracy and relevance—so be sure to check back for new material.
Begin your certification journey today with our JN0-664 dump free questions — and get one step closer to exam success!