(2025) PASS JN0-664 Exam Free Practice Test with 100% Accurate Answers
JN0-664 dumps Free Test Engine Verified By It Certified Experts
Juniper JN0-664 exam is a professional-level certification exam for service provider professionals seeking to advance their careers. JN0-664 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 covers a wide range of topics related to service provider routing and switching, including advanced routing protocols, MPLS, Layer 2 and Layer 3 VPNs, BGP, multicast, and high availability. JN0-664 exam consists of 65 multiple-choice questions and has a time limit of 120 minutes. Candidates must achieve a passing score of 65% or higher to earn their certification. The JNCIP-SP certification is valid for three years, after which candidates must recertify by passing an exam or completing a specified number of continuing education credits. Earning this certification demonstrates a high level of expertise in service provider routing and switching and can open up new career opportunities in the networking industry.
NEW QUESTION # 40
Exhibit
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 the explicit-null statement on PE-1.
- B. Configure the explicit-null statement on PE-2
- C. Configure VPN prefix mapping for the PE-1_to_PE-2 LSP
- D. Set a static CoS value for the PE-1_to_PE-2 LSP
Answer: A
Explanation:
Explanation
The explicit-null statement enables the PE router to send an MPLS label with a value of 0 (explicit null) instead of an IP header for packets destined to the VPN customer sites. This allows the penultimate hop router (the router before the egress PE router) to preserve the EXP bits of the MPLS label and pass them to the egress PE router. The egress PE router can then use these EXP bits to classify the traffic according to the CoS policy2
. In this example, PE-1 should configure the explicit-null statement under [edit protocols mpls label-switched-path PE-1_to_PE-2] hierarchy level.
NEW QUESTION # 41
Referring to the exhibit, which two statements are true? (Choose two.)
- A. This route is learned from the same AS number.
- B. This route is learned from two different AS numbers.
- C. The multihop configuration is used for load balancing.
- D. The multipath configuration is used for load balancing.
Answer: A,D
NEW QUESTION # 42
Exhibit
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. 0
- B. 1
- C. 2
- D. 3
Answer: B
Explanation:
To allow Site 1 to access three VLANs that are located in Site 2 and Site 3, you need to configure three L2VPN routing instances on PE-1, one for each VLAN. Each L2VPN routing instance will have a different VLAN ID and a different VNI for VXLAN encapsulation. Each L2VPN routing instance will also have a different vrf-target export value to identify which VPN routes belong to which VLAN. This way, PE-1 can forward traffic from Site 1 to Site 2 and Site 3 based on the VLAN tags and VNIs.
NEW QUESTION # 43
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.)
- A. 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
- B. 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.
- C. 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.
- D. 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.
Answer: B,C
NEW QUESTION # 44
Exhibit
Referring to the exhibit, which two statements are correct about the dual route reflectors within a cluster?
(Choose two.)
- A. RR1 advertises routes from the client to RR2. using itself as the next hop.
- B. RR1 and RR2 must have the same duster ID to exchange routes learned from the client.
- C. RR1 and RR2 advertise routes learned from the clients to EBGP peers, using itself as the next hop.
- D. RR1 and RR2 append the duster ID when advertising routes from dient to dient.
Answer: C,D
NEW QUESTION # 45
Exhibit
user@Rl show configuration interpolated-profile { interpolate {
fill-level [ 50 75 drop-probability [ > }
class-of-service drop-profiles
];
20 60 ];
Which two statements are correct about the class-of-service configuration shown in the exhibit? (Choose two.)
- A. To use this drop profile, you apply it directly to an interface.
- B. The drop probability jumps immediately from 20% to 60% when the queue level reaches 75% full.
- 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 reference it in a scheduler.
Answer: C,D
Explanation:
class-of-service (CoS) is a feature that allows you to prioritize and manage network traffic based on various criteria, such as application type, user group, or packet loss priority. CoS uses different components to classify, mark, queue, schedule, shape, and drop traffic according to the configured policies.
One of the components of CoS is drop profiles, which define how packets are dropped when a queue is congested. Drop profiles use random early detection (RED) algorithm to drop packets randomly before the queue is full, which helps to avoid global synchronization and improve network performance. Drop profiles can be discrete or interpolated. A discrete drop profile maps a specific fill level of a queue to a specific drop probability. An interpolated drop profile maps a range of fill levels of a queue to a range of drop probabilities and interpolates the values in between.
In the exhibit, we can see that the class-of-service configuration shows an interpolated drop profile with two fill levels (50 and 75) and two drop probabilities (20 and 60). Based on this configuration, we can infer the following statements:
* The drop probability jumps immediately from 20% to 60% when the queue level reaches 75% full. This is not correct because the drop profile is interpolated, not discrete. This means that the drop probability gradually increases from 20% to 60% as the queue level increases from 50% full to 75% full. The drop probability for any fill level between 50% and 75% can be calculated by using linear interpolation formula.
* The drop probability gradually increases from 20% to 60% as the queue level increases from 50% full to
75% full. This is correct because the drop profile is interpolated and uses linear interpolation formula to calculate the drop probability for any fill level between 50% and 75%. For example, if the fill level is
60%, the drop probability is 28%, which is calculated by using the formula: (60 - 50) / (75 - 50) * (60 -
20) + 20 = 28.
* To use this drop profile, you reference it in a scheduler. This is correct because a scheduler is a
* component of CoS that determines how packets are dequeued from different queues and transmitted on an interface. A scheduler can reference a drop profile by using the random-detect statement under the
[edit class-of-service schedulers] hierarchy level. For example: scheduler test { transmit-rate percent 10; buffer-size percent 10; random-detect test-profile; }
* To use this drop profile, you apply it directly to an interface. This is not correct because a drop profile cannot be applied directly to an interface. A drop profile can only be referenced by a scheduler, which can be applied to an interface by using the scheduler-map statement under the [edit class-of-service interfaces] hierarchy level. For example: interfaces ge-0/0/0 { unit 0 { scheduler-map test-map; } }
NEW QUESTION # 46
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.)
- A. 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.
- B. 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.
- C. 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.
- D. 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.
Answer: C,D
Explanation:
We want a static route to the public IP. The private IP is hidden behind the NATed public IP, so a static route to the private range is useless to us.
NEW QUESTION # 47
Exhibit
A network is using IS-IS for routing.
In this scenario, why are there two TLVs shown in the exhibit?
- A. Wide metrics have specifically been requested
- B. The interface specified a metric of 100 for L2.
- C. Both IPv4 and IPv6 are being used in the topology
- D. There are both narrow and wide metric devices in the topology
Answer: D
Explanation:
Explanation
TLVs are tuples of (Type, Length, Value) that can be advertised in IS-IS packets. TLVs can carry different kinds of information in the Link State Packets (LSPs). IS-IS supports both narrow and wide metrics for link costs. Narrow metrics use a single octet to encode the link cost, while wide metrics use three octets. Narrow metrics have a maximum value of 63, while wide metrics have a maximum value of 16777215. If there are both narrow and wide metric devices in the topology, IS-IS will advertise two TLVs for each link: one with the narrow metric and one with the wide metric. This allows backward compatibility with older devices that only support narrow metrics12.
NEW QUESTION # 48
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. The CE and PE OSPF areas must match.
- B. OSPF neighborship is formed between the two CEs.
- C. OSPF neighborship is formed between the CEs and PEs.
- D. The CE and PE OSPF areas can be different.
Answer: B,D
NEW QUESTION # 49
You have an EVI implemented between PE-1, PE-2, and PE-3 to allow communication between CE-1 and CE-2. CE-2 receives unicast traffic from CE-1 on both links to PE-2 and PE-3. When CE-1 sends broadcast traffic. CE-2 receives it on only one of the multihomed links.
Referring to the exhibit, which EVPN route type enables this behavior?
- A. Type 1
- B. Type 3
- C. Type 2
- D. Type 4
Answer: D
NEW QUESTION # 50
By default, which statement is correct about OSPF summary LSAs?
- A. The area-range command must be installed on all routers.
- B. The metric associated with a summary route will be equal to the lowest metric associated with an individual contributing route
- C. All Type 2 and Type 7 LSAs will be summanzed into a single Type 5 LSA
- D. Type 3 LSAs are advertised for routes in Type 1 LSAs.
Answer: D
Explanation:
OSPF uses different types of LSAs to describe different aspects of the network topology. Type 1 LSAs are also known as router LSAs, and they describe the links and interfaces of a router within an area. Type 3 LSAs are also known as summary LSAs, and they describe routes to networks outside an area but within the same autonomous system (AS). By default, OSPF will summarize routes from Type 1 LSAs into Type 3 LSAs when advertising them across area boundaries .
NEW QUESTION # 51
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. You must use RIB groups to leak routes between the inet. o and vpn-a. inet. o tables.
- D. Internet traffic from Site 2 takes the path of PE-2 -> PE-1 -> CE-1 -> PE-1 -> GW-1.
Answer: C,D
Explanation:
To provide Internet access for VPN-A using CE-1 as the hub CE, you need to do the following:
* You must use RIB groups to leak routes between the inet.0 and vpn-a.inet.0 tables on PE-1 and CE-1.
RIB groups are routing options that allow you to import routes from one routing table into another routing table based on certain criteria. In this scenario, you need to configure RIB groups on PE-1 and CE-1 to import Internet routes from inet.0 into vpn-a.inet.0 and vice versa.
* Internet traffic from Site 2 takes the path of PE-2 -> PE-1 -> CE-1 -> PE-1 -> GW-1. This is because Site 2 does not have direct Internet access and needs to use CE-1 as its default gateway for Internet traffic. Site 2 sends its Internet traffic to PE-2, which forwards it to PE-1 based on VPN-A routes. PE-1 then sends it to CE-1 based on RIB group import policy. CE-1 then sends it back to PE-1 based on its default route pointing to GW-1. PE-1 then forwards it to GW-1 based on RIB group import policy again.
NEW QUESTION # 52
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. Add the external interface prefix to the IGP routing tables
- 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, create a policy to change the BGP next hop to 172.16.1.1 and apply it to IBGP as an export policy
- D. Add the internal interface prefix to the BGP routing tables.
Answer: A,B
Explanation:
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.
NEW QUESTION # 53
Which two statements describe PIM-SM? (Choose two)
- A. Routers without receivers must periodically prune themselves from the SPT.
- B. Traffic is initially flooded to all routers and an S,G is maintained for each group
- C. Routers with receivers send join messages to their upstream neighbors.
- D. Traffic is only forwarded to routers that request to join the distribution tree.
Answer: C,D
Explanation:
Explanation
PIM sparse mode (PIM-SM) is a multicast routing protocol that uses a pull model to deliver multicast traffic.
In PIM-SM, routers with receivers send join messages to their upstream neighbors toward a rendezvous point (RP) or a source-specific tree (SPT). The RP or SPT acts as the root of a shared distribution tree for a multicast group. Traffic is only forwarded to routers that request to join the distribution tree by sending join messages.
PIM-SM does not flood traffic to all routers or prune routers without receivers, as PIM dense mode does.
NEW QUESTION # 54
Which two EVPN route types are used to advertise a multihomed Ethernet segment? (Choose two )
- A. Type 3
- B. Type 2
- C. Type 4
- D. Type 1
Answer: C,D
Explanation:
Explanation
EVPN is a solution that provides Ethernet multipoint services over MPLS networks. EVPN uses BGP to distribute endpoint provisioning information and set up pseudowires between PE devices. EVPN uses different route types to convey different information in the control plane. The following are the main EVPN route types:
* Type 1 - Ethernet Auto-Discovery Route: This route type is used for network-wide messaging and discovery of other PE devices that are part of the same EVPN instance. It also carries information about the redundancy mode and load balancing algorithm of the PE devices.
* Type 2 - MAC/IP Advertisement Route: This route type is used for MAC and IP address learning and advertisement between PE devices. It also carries information about the Ethernet segment identifier (ESI) and the label for forwarding traffic to the MAC or IP address.
* Type 3 - Inclusive Multicast Ethernet Tag Route: This route type is used for broadcast, unknown unicast, and multicast (BUM) traffic forwarding. It also carries information about the multicast group and the label for forwarding BUM traffic.
* Type 4 - Ethernet Segment Route: This route type is used for multihoming scenarios, where a CE device is connected to more than one PE device. It also carries information about the ESI and the designated forwarder (DF) election process.
NEW QUESTION # 55
......
To prepare for the Juniper JN0-664 certification exam, candidates can take advantage of a variety of study materials, including official Juniper Networks training courses, self-study guides, and online resources. Juniper Networks offers a range of training courses that cover all of the topics included in the JNCIP-SP certification exam. Candidates can also find a wealth of online resources, including forums, blogs, and community groups, where they can ask questions and get support from other professionals in the industry.
Latest Juniper JN0-664 Practice Test Questions: https://surepass.free4dump.com/JN0-664-real-dump.html