JN0-649 Training & Certification Get Latest JNCIP-ENT Updated on Jun 07, 2025
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Juniper Networks is one of the leading providers of advanced networking solutions globally, and its products are trusted by millions of users worldwide. In an ever-evolving technological landscape, Juniper Networks has taken the lead in developing cutting-edge products and solutions that meet the needs of businesses of all sizes. The company offers a range of certifications designed to equip network engineers and administrators with the knowledge and skills needed to build, manage, and optimize Juniper-based networks. One such certification is the Juniper JN0-649.
The JN0-649 certification exam is intended for individuals who have a strong understanding of networking technologies and concepts. Candidates who pass JN0-649 exam will have the ability to work with Juniper Networks routers, switches, and security devices to configure advanced routing and switching solutions. Enterprise Routing and Switching, Professional (JNCIP-ENT) certification also validates the ability to troubleshoot complex network issues and provide solutions to optimize network performance. By earning the JNCIP-ENT certification, IT professionals can demonstrate their expertise in Juniper Networks enterprise routing and switching technologies, which can lead to career advancement opportunities and increased earning potential.
NEW QUESTION # 97
Referring to the exhibit, there are multiple ASM groups in the 224 0 0.0/4 range Which configuration change is needed to ensure R1 is always the RP for group 224.224.1.1?
- A. Configure R1 with a higher local RP address
- B. Set the priority on R1 to zero
- C. Ensure R1 has a more specific group range
- D. Increase the priority on R1 to higher than R2
Answer: D
NEW QUESTION # 98
Referring to the exhibit, which two statements are correct? (Choose two.)
- A. The BGP neighbor cannot advertise EVPN related routes.
- B. The BGP neighbor can advertise L3 VPN related routes.
- C. The BGP neighbor can advertise EVPN related routes.
- D. The BGP neighbor cannot advertise L3 VPN related routes.
Answer: B,C
NEW QUESTION # 99
You are 802.1X supplicant, but traffic must be accepted once the user has authenticated their computer on the port In this scenario, which supplicant mode should be used?
- A. single-secure
- B. captive-portal
- C. single
- D. multiple
Answer: C
NEW QUESTION # 100
You are using 802.1X authentication in your network to secure all ports. You have a printer that does not support 802.1X and you must ensure that traffic is allowed to and from this printer without authentication.
In this scenario, what will satisfy the requirement?
- A. MACsec
- B. static MAC bypass
- C. MAC RADIUS
- D. MAC filtering
Answer: B
Explanation:
https://www.juniper.net/documentation/us/en/software/junos/user-access/topics/topic-map/static-mac-bypass-mac-radius-authentication.html
NEW QUESTION # 101
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?
- A. Configure the server fail fallback with a value of sustain.
- B. Set the reauthentication interval to a value of 0.
- C. Configure the static MAC bypass for the authentication server.
- D. Set the reauthentication interval to a value of disable.
Answer: A
Explanation:
https://www.juniper.net/documentation/us/en/software/junos/user-access/topics/concept/802-1x- pnac-divert-authentication-understanding-mx-series.html
NEW QUESTION # 102
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?
- A. 802.1X with single-secure supplicant mode
- B. captive portal
- C. MAC RADIUS
- D. 802.1X with multiple supplicant mode
Answer: C
Explanation:
https://www.juniper.net/documentation/us/en/software/junos/user-access/topics/topic-map/mac- radius-authentication-switching-devices.html You can configure MAC RADIUS authentication on an interface that also allows 802.1X authentication, or you can configure either authentication method alone.
If both MAC RADIUS and 802.1X authentication are enabled on the interface, the switch first sends the host three EAPoL requests to the host. If there is no response from the host, the switch sends the host's MAC address to the RADIUS server to check whether it is a permitted MAC address. If the MAC address is configured as permitted on the RADIUS server, the RADIUS server sends a message to the switch that the MAC address is a permitted address, and the switch opens LAN access to the nonresponsive host on the interface to which it is connected.
NEW QUESTION # 103
Referring to the exhibit, which two statements are true regarding Q-in-Q tunneling? (Choose two)
- A. The C-VLAN traffic will be encapsulated with an outer VLAN lag of 150
- B. The C-VLAN traffic will be encapsulated with an outer VLAN tag of 10.
- C. The C-VLANs 100-200 will be sent as the inner VLAN tag
- D. The C-VLAN 150 will be sent as the inner VLAN tag
Answer: B,C
NEW QUESTION # 104
Which two statements are correct about the deployment of EVPN-VXLAN on QFX Series devices? (Choose two.)
- A. Junos OS supports ingress replication for BUM traffic forwarding.
- B. Junos OS supports underlay replication for BUM traffic forwarding.
- C. Type 1 route advertisements always have the single-active flag set to 1.
- D. Type 1 route advertisements always have the single-active flag set to 0.
Answer: A,D
Explanation:
BUM Traffic Forwarding
Junos devices that use MPLS encapsulation for EVPNs can only use ingress replication at this time.
Ingress replication means, to flood traffic to remote PE routers, the traffic has to be replicated, once for each remote PE router.
The EVPN label for this BUM traffic is learned per PE router from the route type 3, inclusive multicast Ethernet tag route.
This table shows the format of the inclusive multicast Ethernet tag route.
All-Active Redundancy (4)
This diagram shows the format of the type 1 route, A-D route per ES. The split horizon label is advertised as part of an extended community attached to the type 1 route. The split horizon label is also called the ESI label. The extended community also indicates what type of redundancy mode is used for this given ESI: single-active represented by binary 1 or active-active represented by binary 0.
NEW QUESTION # 105
You are asked to implement fault tolerant RPs in your multicast network.
Which two solutions would accomplish this behavior? (Choose two.)
- A. Use IGMPv3 with statically defined RPs.
- B. Use anycast PIM with statically defined RPs.
- C. Use BFD with statically defined RPs.
- D. Use MSDP with statically defined RPs.
Answer: B,D
Explanation:
To implement fault-tolerant RPs (Rendezvous Points) in a multicast network, the following two solutions are appropriate:
* Use MSDP with statically defined RPs:
* MSDP (Multicast Source Discovery Protocol) is used to share multicast source information between multiple RPs in different domains or within the same domain. It allows for RP redundancy by ensuring that if one RP fails, another RP can take over the role and continue to manage multicast group memberships.
NEW QUESTION # 106
The connection between DC1 and DC2 is routed as shown in the exhibit.
In this scenario, which statement is correct?
- A. L3VPN must be enabled to advertise reachability.
- B. An IP prefix route provides encoding for intra-subnet forwarding.
- C. The border devices must be able to perform Layer 3 routing and provide IRB functionality.
- D. Type 2 and Type 5 routes will be exchanged between DC1 and DC2.
Answer: C
Explanation:
https://www.juniper.net/documentation/us/en/software/junos/evpn-vxlan/topics/concept/evpn-route-type5-understanding.html
NEW QUESTION # 107
You have scheduled maintenance operations for one of the devices in your OSPF network.
Referring to the exhibit, which three statements are correct? (Choose three.)
- A. R1 participates in OSPF routing but does not send or receive transit traffic.
- B. R1 does not participate in OSPF routing.
- C. The metrics for all transit interfaces on R1 is set to the maximum value of 65,535.
- D. Any traffic destined for networks that terminate on R1 will still be forwarded to R1.
- E. R1 does not send or receive transit traffic during the maintenance window even if no alternative paths exist to the given destination.
Answer: A,C,D
NEW QUESTION # 108
Which statement is correct about CoS policers on Junos devices?
- A. A policer can assign in-profile traffic to a specific forwarding class.
- B. Policers can be configured to buffer traffic that exceeds the policer's traffic profile.
- C. A policer does not alter in-profile traffic.
- D. Traffic that exceeds a policer's traffic profile can be dropped or assigned to a specific drop profile.
Answer: D
NEW QUESTION # 109
Referring to the exhibit, which two statements are correct? (Choose two.)
- A. If the total power consumption exceeds 90 watts, the ge-0/0/11 interface will continue to receive power.
- B. PoE is not enabled on the ge-0/0/0 interface.
- C. The ge-0/0/10 interface supports PoE+.
- D. The maximum wattage that this switch can allocate to attached Ethernet devices is 100 watts.
Answer: C,D
Explanation:
POE is enabled in the interface ge-0/0/0 but nothing is connected to it. switch is in AT mode (poe+) and interface ge-0/0/11 supports poe+ judging by maximun wattage
NEW QUESTION # 110
Referring to the exhibit, traffic ingresses on interface ge-0/0/3 and egresses on interface ge-0/0/4.
Which queue does traffic with the IP precedence value of 100 use?
- A. assured-forwarding
- B. best-effort
- C. expedited-forwarding
- D. network-control
Answer: C
Explanation:
* Understanding the Configuration:
* The provided configuration and output snippets show how traffic is classified and assigned to different forwarding classes based on the IP precedence values.
* The inet-precedence classifier maps specific IP precedence values to forwarding classes with associated loss priorities.
* Review of Classifiers:
* IP Precedence Value 100:
* The IP precedence value 100 in binary is represented as 100 (binary for 4).
* Matching with Classifiers:
* According to the configuration shown in the exhibit:
classifiers {
inet-precedence cos;
}
* The classifier cos maps the following:
forwarding-class expedited-forwarding;
loss-priority low code-points 100;
* Conclusion:
* The IP precedence value 100 matches the expedited-forwarding forwarding class with low loss-priority as per the configuration.
NEW QUESTION # 111
You have an MX960 configured as a Fusion aggregation device (AD) and two QFX5100 switches as satellite devices (SD). You have configured local-switching for each SD. A packet with an unknown MAC address is received on one of the SD extended ports.
Which statement is correct in this scenario?
- A. The packet is silently discarded and a reject message is sent to the AD.
- B. The packet is dropped and a reject message is sent out to the port where it was received.
- C. The packet is sent to the AD to be processed and forwarded.
- D. The packet is flooded out of all the ports on the SD except the one where it was received.
Answer: C
Explanation:
https://www.juniper.net/documentation/en_US/junos/topics/concept/fusion-local-switching.html
NEW QUESTION # 112
Which two statements about MVRP are correct? (Choose two.)
- A. MVRP monitors interfaces using VSTP and dynamically creates VLANs as necessary
- B. MVRP is enabled by adding trunk ports under the [edit protocols mvrp] hierarchy.
- C. MVRP PDUs are sent to other switches as periodic intervals.
- D. MVRP can propagate dynamic VLANs created on one switch to another switch
Answer: B,C
NEW QUESTION # 113
Your network has Junos Fusion configured with MX960 routers as aggregation devices (AD) and QFX5100 switches as satellite devices (SO) Which two statements are coned in this scenario?
(Choose two )
- A. The AD runs the Junos software for all its connected SDs.
- B. All SDs connected to a single AD must use the same software version.
- C. SDs are added to the AD by configuring the cascade port on the AD.
- D. The Fusion extended ports are configured on the SDs.
Answer: C,D
NEW QUESTION # 114
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.)
- A. Verity that the multihop settings are configured on your router.
- B. Verify the export policies on your router.
- C. Verify that the BGP routes are active in your routing table.
- D. Verify the import policies on your router.
Answer: B,C
Explanation:
To troubleshoot why ISP peers are not receiving any routes in a multihomed BGP setup, the following steps are essential:
* Verify Active BGP Routes: Ensure that the BGP routes are active in the routing table. Only active routes can be advertised to BGP peers.
shell
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show route protocol bgp
* Verify Export Policies: Check the export policies configured on your router. The export policies determine which routes are advertised to BGP peers. If these policies are incorrectly configured or missing, routes will not be advertised.
shell
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show configuration policy-options policy-statement <policy-name>
show configuration protocols bgp group <group-name> export
References:
* Useful Juniper Commands.txt
* Tech Ops Managed Router Juniper Install Guide
NEW QUESTION # 115
Referring to the exhibit, which two statements are correct? (Choose two.)
- A. The DS-1 switch will be root bridge for MSTI 2.
- B. The DS-2 switch will be root bridge for MSTI 2.
- C. The DS-1 switch will be root bridge for MSTI 1.
- D. The DS-2 switch will be root bridge for MSTI 1.
Answer: A,D
Explanation:
* Reviewing MST Configuration:
* The configuration shown in the exhibit indicates MST (Multiple Spanning Tree) configuration for DS-1 and DS-2 switches.
* For DS-1:
plaintext
Copy code
mstp {
configuration-name Region-1;
revision-level 1;
interface ge-0/0/8;
interface ge-0/0/9;
interface ge-0/0/10;
interface ge-0/0/12;
msti 1 {
bridge-priority 4k;
vlan 10-19;
}
msti 2 {
bridge-priority 8k;
vlan 20-29;
}
}
* For DS-2:
plaintext
Copy code
mstp {
configuration-name Region-1;
revision-level 1;
interface ge-0/0/8;
interface ge-0/0/9;
interface ge-0/0/10;
interface ge-0/0/12;
msti 1 {
bridge-priority 8k;
vlan 10-19;
}
}
* Understanding Bridge Priority:
* In MSTP, the switch with the lowest bridge priority becomes the root bridge for the respective MST instance.
* For MSTI 1:
* DS-1 bridge-priority is 4k (4096)
* DS-2 bridge-priority is 8k (8192)
* Thus, DS-1 will be the root bridge for MSTI 1.
* For MSTI 2:
* DS-1 bridge-priority is 8k (8192)
* DS-2 does not participate in MSTI 2.
* Thus, DS-1 will be the root bridge for MSTI 2.
* Analyzing VLAN Assignments:
* DS-1 MSTI 1: VLANs 10-19, priority 4k
* DS-1 MSTI 2: VLANs 20-29, priority 8k
* DS-2 MSTI 1: VLANs 10-19, priority 8k
* DS-2 does not have MSTI 2 configuration.
* Conclusion:
* DS-1 is the root bridge for MSTI 1 (C)
* DS-2 does not participate in MSTI 2 (eliminates A)
* DS-1 is the root bridge for MSTI 2 (D)
* DS-2 is not the root bridge for MSTI 1 (eliminates B)
References:
* Configuration snippets
* Understanding of MSTP priorities and root bridge election
NEW QUESTION # 116
Referring to the exhibit, a PIM-SM network is set up to enable communication between multicast devices.
Which two statements are true? (Choose two.)
- A. Before the formation of the rendezvous-point tree, an IGMP is sent from the Receiver to R1.
- B. Before the formation of the rendezvous-point tree, an IGMP is sent from the Source to R5.
- C. Before the formation of the rendezvous-point tree, a join message is sent from R1 to R3.
- D. Before the formation of the rendezvous-point tree, a join message is sent from R1 to R5.
Answer: A,C
Explanation:
In a PIM-SM (Protocol Independent Multicast - Sparse Mode) network setup:
* Before the formation of the rendezvous-point tree, a join message is sent from R1 to R3 (RP):
* R1, being the router connected to the receiver, sends a PIM join message towards the RP (R3) to join the multicast group.
* Before the formation of the rendezvous-point tree, an IGMP is sent from the Receiver to R1:
* The receiver sends an IGMP membership report to its directly connected router (R1), indicating its interest in joining a multicast group.
References:
* The behavior of PIM-SM and the process of join messages and IGMP reports are covered in multicast networking sections of network configuration and design guides.
NEW QUESTION # 117
You enable the Multiple VLAN Registration Protocol (MVRP) to automate the creation and management of virtual LANs.
Which statement is correct in this scenario?
- A. Timers dictate when link state changes are propagated.
- B. MVRP works with RSTP and VSTP.
- C. The forbidden mode does not register or declare VLANs.
- D. When enabled, MVRP affects all interfaces.
Answer: C
Explanation:
MVRP is disabled by default on the switches and, when enabled, affects only trunk interfaces.
Once you enable MVRP, all VLAN interfaces on the switch belong to MVRP (the default normal registration mode) and those interfaces accept PDU messages and send their own PDU messages.
forbidden - The interface does not register or declare VLANS (except statically configured VLANs).
https://www.juniper.net/documentation/us/en/software/junos/mvrp/multicast- l2/topics/concept/mvrp-mx-series-understanding.html
NEW QUESTION # 118
Which three configuration parameters must match on all switches within the same MSTP region? (Choose three.)
- A. region name
- B. revision level
- C. bridge priority
- D. configuration name
- E. VLAN to instance mapping
Answer: B,D,E
Explanation:
For Multiple Spanning Tree Protocol (MSTP) to operate correctly, all switches in the same region must have the same VLAN to instance mapping, revision level, and configuration name. These parameters ensure that all switches interpret the MSTP configuration consistently.
References:
* MSTP Configuration Guide, Juniper Networks
NEW QUESTION # 119
Click the Exhibit.
You have a workstation and VoIP phone connected to port ge-0/0/1 on an access switch.
Referring to the configuration shown in the exhibit, which statement is true?
- A. Untagged frames that enter the switch on interface ge-0/0/1 will be dropped.
- B. The phone will not be able to communicate over the network.
- C. All frames that leave the switch on interface ge-0/0/1 will be dropped.
- D. The phone will require a manual VLAN ID configuration.
Answer: D
NEW QUESTION # 120
A user is attempting to watch a high-definition video being streamed from the media server over the network. However, the user complains that the experienced video quality is poor. While logged on to router B, a Juniper Networks device, you notice that video packets are being dropped.
In this scenario, what would solve this problem?
- A. Adjust the expedited-forwarding BA classifier on router B's ge-0/0/1 interface to support a higher transmit rate.
- B. Adjust the scheduler for the expedited-forwarding forwarding class to support a higher transmit rate.
- C. Adjust the expedited-forwarding BA classifier to router B's ge-0/0/0 interface to support a higher transmit rate.
- D. Adjust the scheduler-map to support a higher transmit rate.
Answer: A
NEW QUESTION # 121
When using wide metrics, which two statements about route advertisement between IS-IS levels are correct? (Choose two.)
- A. Level 1 routes advertised as external routes into Level 1 are not advertised to any Level 2 routers by default.
- B. If wide-metrics-only is configured, Level 1 routes are not advertised to Level 2 routers by default.
- C. Level 1 and Level 2 routers do not advertise Level 2 routes into the Level 1 area by default.
- D. Level 1 routes are advertised to Level 2 routers by default.
Answer: B,C
NEW QUESTION # 122
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