Sep-2025 Realistic JN0-649 Exam Dumps with Accurate & Updated Questions [Q14-Q31]

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Sep-2025 Realistic JN0-649 Exam Dumps with Accurate & Updated Questions

JN0-649 Exam Dumps – PDF Questions and Testing Engine

The JN0-649 certification exam covers a wide range of topics, including BGP, OSPF, ISIS, Layer 2 switching, Ethernet switching, and more. Candidates must have a comprehensive understanding of the Juniper Networks JUNOS software platform and its associated technologies. Also, they must know how to troubleshoot complex network issues, design network solutions, and implement them effectively.

NO.14 Which statement is correct about IS-IS?

IS-IS uses areas and an autonomous system.

Level 1/2 routers automatically inject a default route to the nearest Level 1 router.

Level 2 routers must share the same area address.

Level 1 routers route traffic between autonomous systems.

NO.15 You must ensure that all routes in the 10.0.0/8 address range are not advertised outside of your AS. Which well-known BGP community should be assigned to these addresses to accomplish this task?

no-export

no-peer

internet

no-advertise

NO.16 Referring to the exhibit, which statement is correct when a failure exists on the link between host2 and switch5 on this EVPN-VXLAN fabric?

The switch5 device will send a Type 2 route to all peers.

The switch5 device will send a Type 4 route to all peers.

The switch5 device will send a Type 1 route to all peers.

The switch5 device will send a Type 3 route to all peers.

NO.17 You are asked to establish interface level authentication for users connecting to your network.
You must ensure that only corporate devices, identified by MAC addresses, are allowed to connect and authenticate. Authentication must be handled by a centralized server to increase scalability. Which authentication method would satisfy this requirement?

MAC RADIUS

captive portal

802.1X with single-secure supplicant mode

802.1X with multiple supplicant mode

NO.18 Referring to the exhibit, which two statements are correct? (Choose two.)

The maximum wattage that this switch can allocate to attached Ethernet devices is 100 watts.

If the total power consumption exceeds 90 watts, the ge-0/0/11 interface will continue to receive power.

PoE is not enabled on the ge-0/0/0 interface.

The ge-0/0/10 interface supports PoE+.

NO.19 Which three configuration parameters must match on all switches within the same MSTP region? (Choose three.)

VLAN to instance mapping

revision level

configuration name

bridge priority

region name

NO.20 Which three configuration parameters must match on all switches within the same MSTP region?
(Choose three.)

VLAN to instance mapping

revision level

configuration name

bridge priority

region name

NO.21 You are asked to deploy 802.1X on your EX Series switches. You need to ensure authenticated devices continue to have access to the network even if the authentication server fails.
Which action meets this configuration objective?

Configure the server fail fallback with a value of sustain.

Set the reauthentication interval to a value of 0.

Configure the static MAC bypass for the authentication server.

Set the reauthentication interval to a value of disable.

NO.22 Referring to the exhibit, which statement is correct when a failure exists on the link between host2 and switch5 on this EVPN-VXLAN fabric?

The switch5 device will send a Type 2 route to all peers.

The switch5 device will send a Type 4 route to all peers.

The switch5 device will send a Type 1 route to all peers.

The switch5 device will send a Type 3 route to all peers.

NO.23 You are deploying IP phones in your enterprise networks. When plugged in, the IP phones must automatically negotiate the power requirements for the new connection with the EX Series switches. In this scenario, which protocol should be used to enable this behavior?

CDP

MP-BGP

LLDP-MED

LLDP

NO.24 You will to route Layer 3 PVLAN traffic within the secondary VLAN.
What is required to accomplish this task?

a community VIAN

an IRB

an FBF policy

an isolated VLAN

NO.25 Remote branches connect to the corporate WAN through access switches. The access switches connect to access ports on the WAN distribution switch, as shown in the exhibit. L2PT has previously been configured on the tunnel Layer 2 traffic across the WAN. You decide to move the L2PT tunnel endpoints to the access switches. When you apply the L2PT configuration to the access switches, the ports that connect the access switches to the distribution switch shut down.
Which action would solve this problem?

Configure the links between the access switches and the distribution switch as a trunk port.

Disable the BPDU block function on the access switches.

Disable the BPDU block function on the distribution switch.

Configure a GRE tunnel to encapsulate the L2PT traffic across the WAN.

NO.26 Your network is multihomed to two ISPs. The BGP sessions are established; however, the ISP peers are not receiving any routes.
Which two statements are correct about troubleshooting your configuration? (Choose two.)

Verify the import policies on your router.

Verify that the BGP routes are active in your routing table.

Verify the export policies on your router.

Verity that the multihop settings are configured on your router.

NO.27 Click the Exhibit button.

There is a functioning OSPFv3 neighborship between Router-1 and Router-2 over the ge-0/0/1 link. However, the 172.100.100.0/24 and 172.101.101.100/24 routes are not being shared through OSPFv3.
Referring to the configuration shown in the exhibit, which two actions must you take to solve the problem? (Choose two.)

Add interface ge-0/0/1 under the IPv4 unicast realm for both routers.

Add the IPv6 family protocol under ge-0/0/2 for both routers.

Add the lo0 interface under OSPFv3 for both routers.

Add interface ge-0/0/2 under OSPFv3 for both routers.

NO.28 You are asked to troubleshoot voice quality issues on your newly implement VoIP network. You notice that the voice packets are being dropped. You have verified that the packets are correctly marked for expedited forwarding queue.
Referring to the exhibit, what must you configure to solve the problem?

You must configure a multifield classifier to put the VoIP traffic in the correct queue.

You must configure a rewrite rule to ensure that the traffic is scheduled properly in the device.

You must configure a scheduler to allocate bandwidth to the expedited forwarding queue.

You must configure a policer to ensure that the queue is not being starved.

* Understanding the Problem:
* The issue involves voice packets being dropped in a newly implemented VoIP network.
* Voice packets are marked correctly for the expedited forwarding (EF) queue, indicating that classification is working as intended.
* Dropped packets suggest that there may be insufficient resources allocated to handle the traffic in
* the EF queue.
* Key Concepts:
* Classifiers: These are used to mark packets so that they can be placed into the appropriate forwarding class. This step is already correctly implemented as indicated by the problem statement.
* Rewrite Rules: These ensure that packets retain their markings as they transit the network, but this is not the issue here as packets are already marked correctly.
* Policers: These control the rate of traffic to ensure it does not exceed specified limits, but policing is not required here as the issue is with packet drops due to insufficient resources.
* Schedulers: These allocate resources (bandwidth, priority) to different queues to ensure that high-priority traffic (like VoIP) is transmitted with minimal delay and packet loss.
* Solution: Configuring a Scheduler:
* To prevent the EF queue from being starved of resources and to ensure voice packets are not dropped, you need to configure a scheduler. This scheduler will allocate appropriate bandwidth and priority to the EF queue.
* Configuring Scheduler on Juniper Devices:
* Here is a sample configuration to allocate bandwidth to the expedited forwarding queue:
set class-of-service schedulers voip-scheduler transmit-rate percent 20 set class-of-service schedulers voip-scheduler priority strict-high set class-of-service forwarding-classes queue 1 expedited-forwarding set class-of-service forwarding-classes queue 1 scheduler voip-scheduler
* In this configuration:
* The voip-scheduler is set to allocate 20% of the bandwidth and is given strict-high priority to ensure voice packets are transmitted with the highest priority.
* The EF queue (queue 1) is associated with the voip-scheduler.
* Verification:
* Ensure the scheduler is applied and active on the interfaces handling the VoIP traffic.
* Monitor the interface statistics to ensure that packet drops are minimized and voice quality issues are resolved.
References:
* Juniper Networks Documentation on Class of Service
* Configuring Schedulers

NO.29 You are asked to establish interface level authentication for users connecting to your network. You must ensure that only corporate devices, identified by MAC addresses, are allowed to connect and authenticate. Authentication must be handled by a centralized server to increase scalability.
Which authentication method would satisfy this requirement?

MAC RADIUS

captive portal

802.1X with single-secure supplicant mode

802.1X with multiple supplicant mode

NO.30 Referring to the exhibit, which LSA type is used to advertise 192.168.1.0/24 to R5?

Type 5

Type 4

Type 3

Type 7

NO.31 You are asked to configure 802.1X on your access ports to allow only a single device to authenticate.
In this scenario, which configuration would you use?

single supplicant mode

multiple supplicant mode

single-secure supplicant mode

MAC authentication mode

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Sep-2025 Realistic JN0-649 Exam Dumps with Accurate & Updated Questions [Q14-Q31]

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