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  1. Home
  2. Juniper Certification
  3. JN0-649 Exam
  4. Juniper.JN0-649.v2026-03-25.q126 Dumps
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Question 51

Which two authentication methods are available for OSPF on Juniper devices? (Choose two.)

Correct Answer: A,B
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Question 52

When configuring 802.1X authentication, what are three server fail fallback settings? (Choose three.)

Correct Answer: B,C,E
https://www.juniper.net/documentation/en_US/junos/topics/topic-map/radius-server-configuration- ex-series-cli.html#id-configuring-radius-server-fail-fallback-cli-procedure
https://www.juniper.net/documentation/en_US/junos/topics/topic-map/radius-server-configuration- ex-series-cli.html Permit authentication, allowing traffic to flow from the end device through the interface as if the end device were successfully authenticated by the RADIUS server.
Deny authentication, preventing traffic from flowing from the end device through the interface.
This is the default.
Move the end device to a specified VLAN if the switch receives a RADIUS access-reject message. The configured VLAN name overrides any attributes sent by the server. (The VLAN must already exist on the switch.) Sustain authenticated end devices that already have LAN access and deny unauthenticated end devices. If the RADIUS servers time out during reauthentication, previously authenticated end devices are reauthenticated and new users are denied LAN access.
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Question 53

Click the Exhibit button.

During an outage, you review the status of the Q-in-Q implementation on VLAN 300.
Referring to the exhibit, what would be the cause of the outage?

Correct Answer: C
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Question 54

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.)

Correct Answer: B,C
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.
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Question 55

Referring to the exhibit, which two statements are correct? (Choose two.)

Correct Answer: B,C
DS-1 port status - DESG / FWD - VLAN 10 - ROOT Bridge
DS-1 port status BLK/ALT - VLAN 20
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