New 2025 Realistic Free Juniper JN0-649 Exam Dump Questions and Answer
JN0-649 Practice Test Engine: Try These 195 Exam Questions
Juniper JN0-649 exam is a professional-level certification exam that is designed to test the candidate's knowledge and skills in enterprise routing and switching. JN0-649 exam is intended for individuals who have a strong understanding of networking technologies and protocols and are looking to advance their careers in the field of enterprise networking. The JN0-649 exam covers a wide range of topics, including advanced routing protocols, network virtualization, Layer 2 and Layer 3 switching, and security protocols.
NEW QUESTION # 18
You are asked to enforce user authentication using a captive portal before users access the corporate network.
Which statement is correct in this scenario?
- A. A captive portal can be bypassed using an allowlist command containing a device's IP address.
- B. When enabled, a captive portal must be applied to each individual interface.
- C. All Web browser requests are redirected to the captive portal until authentication is successful.
- D. HTTPS is the default protocol for a captive portal.
Answer: C
Explanation:
Captive Portal Functionality:
* Captive portals are used to enforce user authentication by redirecting web browser requests to a login page until authentication is successful.
Operation:
* When a user connects to the network, their HTTP requests are intercepted and redirected to the captive portal login page. This process continues until the user provides valid credentials.
Implementation:
* Juniper Configuration:
shell
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set security authentication-web redirect-url "http://<captive-portal-url>" set security zones security-zone <zone> interfaces <interface> host-inbound-traffic system-services http set security zones security-zone <zone> interfaces <interface> host-inbound-traffic system-services https set access profile <profile-name> captive-portal
* This configuration ensures that all HTTP/HTTPS traffic is redirected to the specified captive portal for authentication.
References:
* Detailed configuration and operation are documented in "Tech Ops Managed Router Juniper Install Guide" and related documents.
NEW QUESTION # 19
You want to provide Layer 2 connectivity between campus sites using Ethernet switches through a metro Ethernet service provider who is using Q-in-Q tagging on their network.
Referring to the exhibit, what are two design considerations in this environment? (Choose two.)
- A. VXLAN could be implemented on your network across this service provider network.
- B. Each campus switch shown must have S-Tag 300 configured.
- C. L2PT is required on the SP network to support the spanning tree protocol.
- D. Each campus switch shown must have a C-Tag 300 configured.
Answer: A,C
Explanation:
* Understanding the Problem:
* The requirement is to provide Layer 2 connectivity between campus sites using Ethernet switches through a metro Ethernet service provider who is using Q-in-Q tagging.
* Design Considerations:
* VXLAN Implementation:
* VXLAN (Virtual Extensible LAN) can be used to extend Layer 2 networks over Layer 3 networks. It is often used to provide scalability and flexibility in modern data center networks. In this case, VXLAN could be used to encapsulate Layer 2 frames within UDP packets, allowing them to be transported over the service provider's network.
* S-Tag Configuration:
* Q-in-Q tagging, also known as 802.1ad, involves an outer tag (S-Tag) and an inner tag (C-Tag). The service provider network uses the S-Tag to identify and segregate customer traffic. Therefore, each campus switch must have the correct S-Tag (300 in this case) configured to ensure the service provider can correctly handle and route the traffic.
References:
* Juniper Networks: Understanding VXLAN
* Configuring Q-in-Q Tagging
NEW QUESTION # 20
Router R1, in peer AS 65001, advertises routes to R2 using EBGP. R2 advertises the routes learned from R1 to R3 using IBGP.
Referring to the exhibit, to which routers will R3 advertise the BGP routes received from R2?
- A. R4, R5, R6, R7
- B. R6, R7
- C. R2, R4, R5, R6, R7
- D. R4, R5
Answer: D
NEW QUESTION # 21
A BGP network has been designed to provide resiliency and redundancy to a multihomed customer network.
Which two statements are correct in this scenario? (Choose two.)
- A. The ttl statement must be configured to accommodate peering to a loopback address of a directly connected peer.
- B. Both the next hops will be used to forward traffic to R2.
- C. The TTL value of 1 is set to limit the scope of the EBGP session.
- D. A routing policy will be required to forward traffic to both next hops.
Answer: C,D
Explanation:
B - Because only one next hop in forwarding table.
C- Becuse TTL=1 limiting bgp connection to be established only over loopbacks interface.
https://www.juniper.net/documentation/us/en/software/junos/bgp/topics/topic-map/multihop- sessions.html Use the multihop statement to alter the default use of the neighbor's physical address. In addition, you can also specify a time-to-live (TTL) value in the BGP packets to control how far they propagate. We use a TTL value of 1 to ensure that the session cannot be established across any other backdoor links in the network.
NEW QUESTION # 22
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?
- A. single-secure supplicant mode
- B. single supplicant mode
- C. multiple supplicant mode
- D. MAC authentication mode
Answer: A
Explanation:
Single supplicant mode authenticates only the first end device that connects to an authenticator port. All other end devices connecting to the authenticator port after the first has connected successfully, whether they are 802.1X-enabled or not, are permitted access to the port without further authentication. If the first authenticated end device logs out, all other end devices are locked out until an end device authenticates. Single-secure supplicant mode authenticates only one end device to connect to an authenticator port. No other end device can connect to the authenticator port until the first logs out.
NEW QUESTION # 23
You are implementing the route summarization feature of OSPF. Which two results do you achieve in this scenario? (Choose two.)
- A. It reduced the routing table size, enabling devices to store and process less information.
- B. It reduces the impact of topology changes on a device.
- C. It provides optimal routing in the network.
- D. It helps in migrating to future multi-area OSPF network designs.
Answer: A,B
Explanation:
OSPF inter-area route summarization reduces the routing information exchanged between areas and the size of routing tables, and improves routing performance. OSPF inter-area route summarization enables an ABR to summarize contiguous networks into a single network and advertise the network to other areas.
NEW QUESTION # 24
Which two authentication methods are available for OSPF on Juniper devices? (Choose two.)
- A. RSA
- B. Certificate
- C. MD5 authentication
- D. none
Answer: C,D
NEW QUESTION # 25
Referring to the exhibit, anycast RP is implemented to ensure multicast service availability. The source is currently sending multicast traffic using group 239.1.1.1 and R3 is receiving PIM register messages, but R2 does not have active source information.
In this scenario, what are two methods to receive the active source information on R2? (Choose two.)
- A. Configure an MSDP protocol between R2 and R3.
- B. Configure an MSDP protocol between R1 and R2.
- C. Configure an RP set in PIM on R1, allowing R1 to forward PIM register messages to R2 and R3 in the set.
- D. Configure an RP set in PIM on R2 and R3, allowing the RPs to forward PIM register messages to the other RPs in the set.
Answer: C,D
Explanation:
https://www.juniper.net/documentation/us/en/software/junos/multicast/topics/ref/statement/rp-set-edit-protocols-pim.html
NEW QUESTION # 26
Referring to the exhibit, anycast RP is implemented to ensure multicast service availability. The source is currently sending multicast traffic using group 239.1.1.1 and R3 is receiving PIM register messages, but R2 does not have active source information. In this scenario, what are two methods to receive the active source information on R2? (Choose two.)
- A. Configure an MSDP protocol between R2 and R3.
- B. Configure an MSDP protocol between R1 and R2.
- C. Configure an RP set in PIM on R1, allowing R1 to forward PIM register messages to R2 and R3 in the set.
- D. Configure an RP set in PIM on R2 and R3, allowing the RPs to forward PIM register messages to the other RPs in the set.
Answer: C,D
NEW QUESTION # 27
Which statement is correct about IS-IS?
- A. Level 2 routers must share the same area address.
- B. IS-IS uses areas and an autonomous system.
- C. Level 1/2 routers automatically inject a default route to the nearest Level 1 router.
- D. Level 1 routers route traffic between autonomous systems.
Answer: B
Explanation:
IS-IS (Intermediate System to Intermediate System) is a link-state routing protocol used to move information efficiently within a computer network. Here is the detailed explanation about the statements:
* Option A: IS-IS uses areas and an autonomous system.
* This statement is correct. IS-IS organizes the network into a single autonomous system (AS), which can be divided into smaller groups called areas. Routing between areas is organized hierarchically. Each IS-IS network is treated as an autonomous system, and within that AS, multiple areas can be defined for efficient routing.
* Option B: Level 1/2 routers automatically inject a default route to the nearest Level 1 router.
* This statement is incorrect. Level 1/2 routers do not automatically inject default routes. Instead, they set the ATTACHED bit in their Level 1 link-state PDU when they can reach other areas, prompting Level 1 routers to use them as default gateways.
* Option C: Level 2 routers must share the same area address.
* This statement is incorrect. Level 2 routers operate across multiple areas and do not need to share the same area address. They are responsible for inter-area routing and thus work across different areas.
* Option D: Level 1 routers route traffic between autonomous systems.
* This statement is incorrect. Level 1 routers route traffic within a single area and forward inter-area traffic to Level 2 routers, which handle inter-area routing.
ConclusionGiven the above explanations, the correct statement about IS-IS is:
* A: IS-IS uses areas and an autonomous system.
This is based on the hierarchical structure of IS-IS routing where the network is divided into areas within a single autonomous system.
For further details, you can refer to the Juniper IS-IS Overview.
NEW QUESTION # 28
Referring to the exhibit, anycast RP is implemented to ensure multicast service availability. The source is currently sending multicast traffic using group 239.1.1.1 and R3 is receiving PIM register messages, but R2 does not have active source information. In this scenario, what are two methods to receive the active source information on R2? (Choose two.)
- A. Configure an MSDP protocol between R1 and R2.
- B. Configure an MSDP protocol between R2 and R3.
- C. Configure an RP set in PIM on R1, allowing R1 to forward PIM register messages to R2 and R3 in the set.
- D. Configure an RP set in PIM on R2 and R3, allowing the RPs to forward PIM register messages to the other RPs in the set.
Answer: B,D
Explanation:
MSDP or anycast-PIM with rp-set should be configured on all anycast RP routers.
https://www.juniper.net/documentation/us/en/software/junos/multicast/topics/topic-map/mcast- pim-anycast-rp.html
NEW QUESTION # 29
A customer needs to pass Layer 2 protocols between sites.
Which protocol or standard would be required to implement connectivity on EX4300, EX3400, and EX2300 devices?
- A. Q-in-Q
- B. OSPF
- C. VPLS
- D. IGMP
Answer: A
NEW QUESTION # 30
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?
- A. You must configure a multifield classifier to put the VoIP traffic in the correct queue.
- B. You must configure a rewrite rule to ensure that the traffic is scheduled properly in the device.
- C. You must configure a scheduler to allocate bandwidth to the expedited forwarding queue.
- D. You must configure a policer to ensure that the queue is not being starved.
Answer: C
NEW QUESTION # 31
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. The metrics for all transit interfaces on R1 is set to the maximum value of 65,535.
- B. R1 does not participate in OSPF routing.
- C. R1 participates in OSPF routing but does not send or receive transit traffic.
- D. R1 does not send or receive transit traffic during the maintenance window even if no alternative paths exist to the given destination.
- E. Any traffic destined for networks that terminate on R1 will still be forwarded to R1.
Answer: A,C,E
NEW QUESTION # 32
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?
- A. Disable the BPDU block function on the access switches.
- B. Configure a GRE tunnel to encapsulate the L2PT traffic across the WAN.
- C. Configure the links between the access switches and the distribution switch as a trunk port.
- D. Disable the BPDU block function on the distribution switch.
Answer: C
Explanation:
* Understanding the Problem:
* The ports between the access switches and the distribution switch are shutting down when the L2PT configuration is applied. This typically happens due to a mismatch in port configurations or protocol incompatibilities.
* Examining the Configurations:
* L2PT (Layer 2 Protocol Tunneling) allows tunneling of Layer 2 traffic, which includes protocols like STP (Spanning Tree Protocol), CDP (Cisco Discovery Protocol), VTP (VLAN Trunking Protocol), etc. over a Layer 2 network.
* If the L2PT is applied on access ports, it may lead to conflicts or shut down the ports as access ports are typically not configured to handle Layer 2 protocol traffic beyond their designated VLAN.
* Solution: Configure Trunk Ports:
* By configuring the links between the access switches and the distribution switch as trunk ports, you allow multiple VLANs to be carried over a single physical link. Trunk ports can carry tagged traffic for multiple VLANs, which includes the tunneled Layer 2 protocols.
* This setup prevents the ports from shutting down and enables the correct tunneling of Layer 2 protocols.
References:
* Juniper Documentation on L2PT Configuration
* Troubleshooting Layer 2 Protocol Tunneling Issues
NEW QUESTION # 33
You are asked to enforce user authentication using a captive portal before users access the corporate network.
Which statement is correct in this scenario?
- A. A captive portal can be bypassed using an allowlist command containing a device's IP address.
- B. When enabled, a captive portal must be applied to each individual interface.
- C. All Web browser requests are redirected to the captive portal until authentication is successful.
- D. HTTPS is the default protocol for a captive portal.
Answer: C
Explanation:
You can set up captive portal authentication on your switch to redirect all Web browser requests to a login page that requires users to input a username and password before they are allowed access. Upon successful authentication, users are allowed access to the network and redirected to the original page requested. Junos OS provides a customizable template for the captive portal window that allows you to easily design and modify the look of the captive portal login page. You can modify the design elements of the template to change the look of your captive portal login page and to add instructions or information to the page. You can also modify any of the design elements of a captive portal login page. The first screen displayed before the captive login page requires the user to read the terms and conditions of use. By clicking the Agree button, the user can access the captive portal login page. https://www.juniper.net/documentation/us/en/software/junos/user-access/topics/topic-map/user-authentication-captive-portal.html
NEW QUESTION # 34
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. The metrics for all transit interfaces on R1 is set to the maximum value of 65,535.
- B. R1 does not participate in OSPF routing.
- C. R1 participates in OSPF routing but does not send or receive transit traffic.
- D. R1 does not send or receive transit traffic during the maintenance window even if no alternative paths exist to the given destination.
- E. Any traffic destined for networks that terminate on R1 will still be forwarded to R1.
Answer: A,C,E
Explanation:
- Configure the local routing device so that it appears to be overloaded. You might do this when you want the routing device to participate in OSPF routing, but do not want it to be used for transit traffic. - Traffic destined to directly attached interfaces continues to reach the routing device. - When configured, the transit interface metrics are set to the maximum value of 65535.
https://www.juniper.net/documentation/us/en/software/junos/ospf/topics/ref/statement/overload-edit-protocols-os
https://www.juniper.net/documentation/us/en/software/junos/ospf/topics/topic-map/configuring-ospf-route-contr
NEW QUESTION # 35
You are troubleshooting an EVPN-VXLAN IP fabric and observe the loop shown in the exhibit.
Which two steps would you take to further troubleshoot this problem? (Choose two.)
- A. Issue the show route table bgp.evpn.0 command on Leaf2 and verify that Type 3 routes are present.
- B. Verify that the same ESI is configured on the link from the host and that it matches the source.
- C. Verify that the same ESI is configured on the two links from the source.
- D. Issue the show route table bgp.evpn.0 command on Leaf2 and verify that Type 4 routes are present.
Answer: A,D
Explanation:
Type 2 route, MAC with IP advertisement route-Type 2 routes are per-VLAN routes, so only PEs that are part of a VNI need these routes. EVPN allows an end host's IP and MAC addresses to be advertised within the EVPN Network Layer reachability information (NLRI). This allows for control plane learning of ESI MAC addresses. Because there are many Type 2 routes, a separate route- target auto-derived per VNI helps to confine their propagation. This route type is supported by all EVPN switches and routers.
Type 5 route, IP prefix Route-An IP prefix route provides encoding for inter-subnet forwarding.
In the control plane, EVPN Type 5 routes are used to advertise IP prefixes for inter-subnet connectivity across data centers. To reach a tenant using connectivity provided by the EVPN Type 5 IP prefix route, data packets are sent as Layer 2 Ethernet frames encapsulated in the VXLAN header over the IP network across the data centers.
NEW QUESTION # 36
You are implementing the route summarization feature of OSPF.
Which two results do you achieve in this scenario? (Choose two.)
- A. It reduced the routing table size, enabling devices to store and process less information.
- B. It reduces the impact of topology changes on a device.
- C. It provides optimal routing in the network.
- D. It helps in migrating to future multi-area OSPF network designs.
Answer: A,B
Explanation:
OSPF Route Summarization Benefits:
* Reduces Routing Table Size: By summarizing routes, multiple specific routes are combined into a single route. This reduces the number of entries in the routing table, making it more efficient and easier for the devices to process. This is critical in large networks to maintain performance and manageability.
* Reduces Impact of Topology Changes: When a topology change occurs in one of the summarized routes, it does not need to propagate throughout the entire network. Only the summary route may need to be updated, which minimizes the impact and limits the scope of updates needed.
Implementation in OSPF:
* Configuration Example:
shell
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set protocols ospf area 0.0.0.0 range 10.1.0.0/16
* This command summarizes the routes in area 0.0.0.0 to a single route of 10.1.0.0/16.
References:
* The documents provided, such as "network-mgmt.pdf" and other relevant configuration guides, emphasize these benefits as fundamental to efficient OSPF deployment.
NEW QUESTION # 37
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Juniper JN0-649 certification exam is designed for network professionals seeking to validate their expertise in Juniper routing and switching technologies. Enterprise Routing and Switching, Professional (JNCIP-ENT) certification is part of the Enterprise Routing and Switching track and is the stepping stone to becoming a JNCIP-ENT certified engineer. Individuals who pass the exam demonstrate they have the knowledge and skills to configure and manage Juniper-based routing and switching networks at an advanced level.
Guaranteed Success in JNCIP-ENT JN0-649 Exam Dumps: https://examsites.premiumvcedump.com/Juniper/valid-JN0-649-premium-vce-exam-dumps.html