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Juniper JN0-649 Exam Syllabus Topics:

Topic Details
Topic 1
  • Given a scenario, demonstrate knowledge of how to configure, troubleshoot, or monitor EVPN
  • Describe the concepts, operation, or functionality of Junos EVPN

Topic 2
  • Given a scenario, demonstrate knowledge of how to configure, troubleshoot, or monitor IGPs
  • BGP attributes: concept and operation

Topic 3
  • Demonstrate knowledge of how to configure, troubleshoot, or monitor CoS for Layer 2 or 3 networks
  • CoS processing on Junos devices

Topic 4
  • Given a scenario, demonstrate knowledge of how to configure, troubleshoot, or monitor BGP
  • BGP route selection process

Topic 5
  • Components of IP multicast, including multicast addressing IP multicast traffic flow
  • Any-Source Multicast (ASM) vs. Source-Specific Multicast (SSM)

Topic 6
  • Load balancing - multipath, multihop, forwarding table
  • Interior Gateway Protocols (IGPs)


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Juniper Enterprise Routing and Switching, Professional (JNCIP-ENT) Sample Questions (Q30-Q35):

NEW QUESTION # 30
You are configuring MSTP to prevent loops in your Layer 2 network. After applying the configuration, you notice that MSTO is not working correctly.

Referring to the exhibit, what is causing the problem?

  • A. Incorrect revision number is used.
  • B. Too many VLANs have been defined.
  • C. Context identifier must be specified.
  • D. MSTI-to-VLAN mappings must be the same.

Answer: D
NEW QUESTION # 31
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 flooded out of all the ports on the SD except the one where it was received.
  • C. The packet is dropped and a reject message is sent out to the port where it was received.
  • D. The packet is sent to the AD to be processed and forwarded.

Answer: D Explanation:
https://www.juniper.net/documentation/en_US/junos/topics/concept/fusion-local-switching.html
NEW QUESTION # 32
Which three configuration parameters must match on all switches within the same MSTP region? (Choose three.)

  • A. VLAN to instance mapping
  • B. region name
  • C. bridge priority
  • D. configuration name
  • E. revision level

Answer: A,B,E Explanation:
When enabling MSTP, you define one or more MSTP regions. An MSTP region defines a logical domain where multiple spanning-tree instances (MSTIs) can be administered independently of MSTIs in other regions, setting the boundary for bridge protocol data units (BPDUs) sent by one MSTI. An MSTP region is a group of switches that is defined by three parameters:
Region name-User-defined alphanumeric name for the region.
Revision level-User-defined value that identifies the region.
Mapping table-Numerical digest of VLAN-to-instance mappings.
https://www.juniper.net/documentation/us/en/software/junos/stp-l2/topics/topic-map/spanning-tree-configuring-mstp.html
NEW QUESTION # 33
There are two BGP routes to 10.200.200.0/24 received from two external peers. Route 1 comes from a neighbor with a router ID of 10.10.100.1 and a peer IP address of 10.10.30.1, and route 2 comes from a neighbor with a router ID of 10.10.200.1 and a peer IP address of 10.10.50.1. Both routes have the same MED value, origin value, AS path length, and local preference number. In this scenario, which statement is correct about the active route?

  • A. Route 2 will be active because of the peer IP address.
  • B. Route 2 will be active because of the router ID.
  • C. Route 1 will be active because of the peer IP address.
  • D. Route 1 will be active because of the router ID.

Answer: B
NEW QUESTION # 34
You notice a mass withdrawal of routes for some of the network hosts. You determine that the link on the ESI interface is down.
Which route type is used in this scenario?

  • A. Type 1
  • B. Type 2
  • C. Type 3
  • D. Type 5

Answer: A Explanation:
https://www.juniper.net/documentation/en_US/junos/topics/concept/evpn-bgp-multihoming- overview.html#jd0e270 This is a Type 1 mandatory route, used for fast convergence and for advertising the split horizon label. It is also known as the mass withdraw route.
NEW QUESTION # 35
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