[Jul 24, 2026] Juniper JN0-650 Real Exam Questions and Answers FREE
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Juniper JN0-650 Exam Syllabus Topics:
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NEW QUESTION # 28
Exhibit.
Referring to the exhibit. Ieaf2 is elected the designated forwarder
Which two statements are correct if server2 generates a broadcast frame*? (Choose two.)
- A. The broadcast frame will be forwarded to leaf1 and Ieaf2.
- B. The broadcast frame will not be forwarded to leaf1.
- C. Only Ieaf2 will forward the broadcast frame to server1
- D. Only leaf1 will forward the broadcast frame to server1.
Answer: A,C
Explanation:
The exhibit illustrates an EVPN-VXLAN fabric using multi-homing. Server1 is dual-homed to Leaf1 and Leaf2 using an Ethernet Segment Identifier (ESI) in an active-active or active-standby configuration. Server2 is single-homed to Leaf3.
In EVPN environments, specific mechanisms are used to prevent loops and duplicate traffic when dealing with Broadcast, Unknown Unicast, and Multicast (BUM) traffic:
Broadcast Propagation (Option A): When Server2 (connected to Leaf3) generates a broadcast frame, Leaf3 encapsulates this traffic into a VXLAN tunnel and forwards it to all other VTEPs (Virtual Tunnel End Points) that participate in that specific Virtual Network Instance (VNI). Therefore, both Leaf1 and Leaf2 will receive the broadcast frame from the core fabric.
Designated Forwarder (DF) Election (Option C): To prevent a multi-homed device (like Server1) from receiving duplicate copies of the same broadcast frame from multiple leaf switches, EVPN utilizes a Designated Forwarder (DF). For a given ESI, only one leaf switch is elected as the DF.
The exhibit explicitly states that Leaf2 is the Designated Forwarder.
According to the Junos EVPN implementation, only the DF is responsible for decapsulating BUM traffic received from the core and forwarding it to the local access segment.
While Leaf1 receives the frame (Option A), it will see that it is not the DF for that segment and will drop the frame rather than forwarding it to Server1. This ensures Server1 receives exactly one copy of the broadcast, delivered by Leaf2.
Option B is incorrect because in a standard ingress replication or multicast-based underlay, all VTEPs in the VNI receive the broadcast.
Option D is incorrect because Leaf1 is the non-designated forwarder (non-DF) for this segment and is prohibited from forwarding BUM traffic to the ESI.
NEW QUESTION # 29
Click the Exhibit button.
You created a PVLAN between two EX Series switches and configured the ge-0/0/1 interface on both switches as trunk ports. You notice that traffic for community VLANs configured on both switches is not forwarded over the ge-0/0/1 trunk ports.
Referring to the exhibit, which action will solve this problem?
- A. Configure the vlan-auto-sense parameter for the ge-0/0/1 interface on both switches.
- B. Configure the inter-switch-link parameter for the ge-0/0/1 interface on both switches.
- C. Configure the vlan-rewrite parameter for the ge-0/0/1 interface on both switches.
- D. Configure the core-facing parameter for the ge-0/0/1 interface on both switches.
Answer: B
Explanation:
For PVLAN traffic to pass between EX Series switches, the trunk links connecting the switches must be configured as inter-switch links. This allows the primary, isolated, and community VLAN traffic associated with the PVLAN domain to be carried correctly between switches.
NEW QUESTION # 30
You have configured a EX Series access switch to support hosts and VoIP devices. A voice VLAN has been assigned and voice traffic has been assigned to the expedited-forwarding class. Users are complaining of poor voice quality.
How can you solve this problem?
- A. Configure class of service to service the expedited-forwarding class.
- B. Configure a rate policer and filter non-voice traffic.
- C. Assign voice traffic to the network-control forwarding class.
- D. Assign a different voice VLAN to each port.
Answer: A
NEW QUESTION # 31
When implementing BGP routing policy, which Junos policy-statement term action can be used to reject a route?
- A. reject
- B. next policy
- C. accept
- D. next term
Answer: A
NEW QUESTION # 32
Which statement is true regarding the OSPF overload setting?
- A. It removes the device from the link state database advertisements.
- B. It disables OSPF routing on a device.
- C. It sets the metric to all interfaces to 65,535.
- D. It limits the number of link state database entries.
Answer: C
NEW QUESTION # 33
You want to implement a system in your network to simplify VLAN management that can also dynamically create and prune VLANs. How would you accomplish this task?
- A. Enable MVRP on access interfaces.
- B. Enable MVRP and GVRP on all interfaces.
- C. Enable GVRP on access interfaces.
- D. Enable MVRP on trunk interfaces.
Answer: D
NEW QUESTION # 34
Click the Exhibit button.
You have configured OSPF as shown in the exhibit but find that you are broadcasting LSAs for all three of your configured loopback addresses.
What do you need to do to limit the LSA broadcast to only the first loopback address?
- A. Configure the lo0.0 application-specific attribute.
- B. You must change the other interfaces to different Class C addresses.
- C. Configure the lo0.0 flood-reduction attribute.
- D. Change interface lo0.0 to interface 192.168.1.1 under the protocol configuration.
Answer: D
Explanation:
Specifying the individual loopback address under OSPF limits OSPF advertisement to that specific address. When the logical loopback interface is added instead, OSPF advertises all configured addresses on that interface as stub links in the router LSA.
NEW QUESTION # 35
What is the significance of the rendezvous point in PIM sparse-mode multicast routing?
- A. It acts as a central controller for all multicast streams in the network
- B. It serves as the backup mechanism for multicast stream delivery
- C. It is used to optimize the multicast path to each receiver
- D. It is the initial meeting place for receivers and senders of multicast data
Answer: D
NEW QUESTION # 36
Which two statements are true regarding OSPF LSAs? (Choose two.)
- A. Type 1 LSAs have a link scope.
- B. Type 3 LSAs have an area scope.
- C. Type 1 LSAs have an area scope.
- D. Type 3 LSAs have a domain scope.
Answer: B,C
NEW QUESTION # 37
Exhibit:
You are configuring dynamic rendezvous points for your PIM multicast domain. You have chosen to use auto-RP as the dynamic RP mechanism. You are not seeing the auto-RP announcements. Referring to the exhibit, which two configurations will solve this problem? (Choose two.)
- A. Configure the interfaces for sparse-dense mode.
- B. Configure the rp for the mapping function.
- C. Configure the dense-groups for addresses 224.0.1.39 and 224.0.1.40.
- D. Configure the interfaces for sparse mode.
Answer: A,C
NEW QUESTION # 38
A modified deficit round-robin scheduler is defined by which two variables? (Choose two.)
- A. Layer 3 fields
- B. Layer 2 fields
- C. buffer size
- D. transmit rate
Answer: C,D
Explanation:
A modified deficit round-robin scheduler uses the transmit rate to determine how bandwidth is allocated among queues during scheduling operations.
The scheduler also relies on buffer size to control queue depth and manage congestion handling behavior for queued traffic.
NEW QUESTION # 39
What is the role of IGMP in IP multicast?
- A. To synchronize multicast routing information across routers
- B. To provide end-to-end encryption for multicast streams
- C. To manage host group memberships on a local network
- D. To announce the availability of multicast sources to the network
Answer: C
NEW QUESTION # 40
Click the Exhibit button.
You are asked to configure BGP authentication on your network using TCP-AO, similar to what is shown in the exhibit.
In this scenario, which two statements are true? (Choose two.)
- A. Neighbor 172.18.1.1 will use recv-id 2 to verify the hash.
- B. BGP is using AES for authentication.
- C. BGP is using MD5 for authentication.
- D. Neighbor 172.18.1.1 will use send-id 9 to verify the hash.
Answer: A,B
Explanation:
The BGP session is configured to use TCP-AO authentication with the AES-128-CMAC-96 cryptographic algorithm, so AES is being used for authentication.
The configured receive ID is used to verify incoming TCP-AO hashes from the neighbor.
NEW QUESTION # 41
Click the Exhibit button.
You are troubleshooting suboptimal routing in an enterprise OSPFv2 deployment:
-- R1 is an ABR between Area 0 and Area 1.
-- R2 is an ABR between Area 0 and Area 2.
-- R3 in Area 1 advertises a network that should be reachable by routers in Area 2.
-- The ABRs are connected in the backbone (Area 0).
On router R2, the show ospf database does not display router LSAs or network LSAs from Area 1, but an interarea route to R3's network exists in the routing table. R2 does not have Type-1 or Type-2 LSAs from Area 1 in its OSPF database.
Referring to the exhibit, which statement is correct?
- A. Junos disables Type-1 and Type-2 LSAs by default in Interarea LSDBs.
- B. R2 is filtering them using the OSPF import policy.
- C. Type-1 and Type-2 LSAs are summarized into Type-3 LSAs by ABRs and do not cross area boundaries.
- D. R2 is running OSPFv3, which does not use Type-1 or Type-2 LSAs.
Answer: C
Explanation:
The behavior described is the fundamental operational principle of OSPF ' s hierarchical area structure.
* LSA Flooding Scope: In OSPFv2, Type-1 (Router) and Type-2 (Network) Link-State Advertisements (LSAs) are restricted to a local area flooding scope . They contain detailed topology information (such as which routers are connected to which links) that is only relevant for calculating the Shortest Path First (SPF) tree within that specific area.
* ABR Functionality: Area Border Routers (ABRs), such as R1 in this scenario, act as the gateway between areas. The ABR does not forward Type-1 or Type-2 LSAs from one area to another. Instead, it extracts the prefix information (the network address and mask) from those LSAs and generates a Type-
3 (Summary) LSA .
* Interarea Reachability: This Type-3 LSA is then flooded into the backbone (Area 0) and subsequently into other non-backbone areas, such as Area 2. This explains why R2 sees an " interarea route " to R3's network in its routing table and has the corresponding Type-3 LSA in its database, but cannot see the original Type-1 or Type-2 LSAs from Area 1.
* Why other options are incorrect: Option A is incorrect because this is standard protocol behavior, not the result of a manual filter. Option B is incorrect as there is no such " disable " feature; the protocol design inherently prevents these LSAs from crossing boundaries. Option C is incorrect because OSPFv3 still uses Type-1 and Type-2 LSAs (renamed but functionally similar for topology), and the prompt specifically identifies the deployment as OSPFv2 .
NEW QUESTION # 42
Click the Exhibit button.
Referring to the exhibit, which two statements are correct? (Choose two.)
- A. The bandwidth reservation for queue 0 is 76%.
- B. The bandwidth reservation for queue 0 is 100%.
- C. During times of sustained network congestion, traffic that is placed in queue 2 will be dropped if more than 10% of the interface bandwidth is used.
- D. During times of no network congestion, traffic that is placed in queue 2 will be dropped if more than 10% of the interface bandwidth is used.
Answer: B,C
Explanation:
The best-effort queue (queue 0) does not have a reserved bandwidth, so it effectively has 100% of remaining bandwidth after the other queues are serviced. For assured-forwarding (queue 2), the bandwidth reservation is 10%, so during sustained congestion, any traffic exceeding this allocation can be dropped to enforce the bandwidth limits.
NEW QUESTION # 43
Exhibit:
Referring to the exhibit, the source is currently sending multicast traffic using group 224.1.1.1, which is being received by R1. R2 is not receiving PIM register messages. What would be the cause of this problem?
- A. R5 has not received an IGMP report of 224.1.1.1.
- B. Tunnel services have not been enabled on R1.
- C. A(*,G) tree has not been built yet.
- D. All routers have not been configured with the same Auto-RP discovery group.
Answer: A
NEW QUESTION # 44
You have configured a EX Series access switch to support VoIP phones. The voice VLAN has been configured to manage voice traffic.
Which statement is true?
- A. Traffic will be sent to the host untagged; voice traffic will be sent tagged with the VLAN tag assigned to the port.
- B. Traffic will be sent to the host tagged with the VLAN tag associated with the port; voice traffic will be sent untagged.
- C. Traffic will be sent to the host untagged; voice traffic will be sent tagged with the vlan tag configured in the VoIP settings.
- D. Traffic will be sent to the host tagged with the VLAN tag associated with the port; voice traffic will be sent with the VLAN tag configured in the VoIP settings.
Answer: C
NEW QUESTION # 45
How does Source-Specific Multicast (SSM) differ from Any-Source Multicast (ASM)?
- A. SSM allows receivers to join multicast groups from specific sources, while ASM allows from any source.
- B. SSM requires an RP for multicast group communication, while ASM does not.
- C. ASM uses IGMPv3, while SSM uses IGMPv2.
- D. ASM is used for one-to-many communications, while SSM is used for many-to-many.
Answer: A
NEW QUESTION # 46
Your OSPF network consists of a mix of 1GbE and 10GbE interfaces. By default, all interfaces have the same cost in your OSPF network. You are asked to ensure that the 10GbE interfaces are more preferred when available In this scenario, which two statements would accomplish this behavior? (Choose two.)
- A. You should manually assign the interface metric for each 1GbE interface to be higher than the 10GbE interfaces in your OSPF network.
- B. You should define the reference bandwidth as 10G. which will assign the 1GbE interfaces a higher cost
- C. You should define the reference bandwidth as 1G. which will assign the 1GbE interfaces a higher cost.
- D. You should manually assign the interface metric for each 10GbE interface to be higher than the 1GbE interfaces in your OSPF network.
Answer: A,B
Explanation:
OSPF determines the best path to a destination by calculating themetric (cost)of each link. By default, Junos OS uses areference bandwidthof100 Mbpsto calculate this cost using the formula:
When the reference bandwidth is left at the default 100 Mbps, any interface with a speed of 100 Mbps or higher (including 1 GbE and 10 GbE) is assigned a cost of1because the minimum OSPF cost is 1. This results in equal-cost paths, preventing the router from preferring the faster 10 GbE link.
To ensure 10 GbE interfaces are preferred, you must create a cost differential:
* Option A (Reference Bandwidth):By increasing the reference bandwidth to10G(or higher), the calculation changes. For a 10 GbE link, the cost becomes $10,000 / 10,000 = 1$. For a 1 GbE link, the cost becomes $10,000 / 1,000 = 10$. Since OSPF prefers the path with thelowest cumulative cost, the
10 GbE link is now preferred.
* Option D (Manual Metric):You can manually override the automatic cost calculation by assigning a higher metric specifically to the 1 GbE interfaces. If a 1 GbE interface is manually set to a cost of 50 and the 10 GbE interface remains at 1 (or is set to a lower value), the router will prioritize the 10 GbE path.
Option Bis incorrect because a higher metric makes a pathlesspreferred.Option Cis incorrect because a 1G reference bandwidth would still result in both 1 GbE and 10 GbE interfaces having a cost of 1.
NEW QUESTION # 47
Which two statements are true regarding BGP Local-Preference? (Choose two.)
- A. The AS-path length takes preference over the local preference value.
- B. A higher local preference value is preferred over a lower local preference value.
- C. A lower local preference value is preferred over a higher local preference value
- D. The local preference value takes preference over the AS-path length.
Answer: B,D
NEW QUESTION # 48
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