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Juniper JN0-364 Exam Syllabus Topics:

SectionObjectives
Topic 1: MPLS and Service Provider Technologies- VPN services
  • 1. Layer 2 VPN overview
    • 2. Layer 3 VPN concepts
      - MPLS fundamentals
      • 1. Label switching and forwarding
        • 2. LDP operations
          Topic 2: BGP and Routing Policy- BGP fundamentals
          • 1. eBGP and iBGP operations
            • 2. Attributes and path selection
              - Routing policy control
              • 1. Import/export policies
                • 2. Route filtering and manipulation
                  Topic 3: Troubleshooting and Operations- Network troubleshooting methodology
                  • 1. Junos operational commands
                    • 2. Protocol verification tools
                      - Performance and monitoring
                      • 1. System logging and alarms
                        • 2. Traffic analysis basics
                          Topic 4: Service Provider Architecture & Junos Fundamentals- Service provider network design basics
                          • 1. Core, edge, and access architecture
                            • 2. Scalability considerations
                              - Junos OS routing fundamentals
                              • 1. Routing table and forwarding concepts
                                • 2. Junos CLI and configuration hierarchy
                                  Topic 5: OSPF and IS-IS Routing Protocols- OSPF configuration and troubleshooting
                                  • 1. Areas and LSAs
                                    • 2. Adjacency and neighbor states
                                      - IS-IS operation in service provider networks
                                      • 1. Levels and routing hierarchy
                                        • 2. LSP and SPF calculation

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                                          Juniper Service Provider Routing and Switching, Specialist (JNCIS-SP) Sample Questions (Q18-Q23):

                                          NEW QUESTION # 18
                                          Which two statements are correct about default BGP route propagation? (Choose two.)

                                          Answer: B,C


                                          NEW QUESTION # 19
                                          You are monitoring OSPF on a router and notice frequent state changes between Full and Down. Which condition would cause this behavior?

                                          Answer: C

                                          Explanation:
                                          When troubleshooting OSPF in a service provider environment, distinguishing between "stuck" adjacencies and "flapping" adjacencies is the first step. A session that transitions frequently betweenFullandDown indicates that the relationship can be established successfully (meaning parameters match), but it cannot be maintained.
                                          According to Juniper Networks documentation, the most common cause for a session to drop from Full to Down is the expiration of theDead Interval. If a router does not receive a Hello packet within the Dead Interval (usually 40 seconds), it tears down the adjacency. Aphysical interface flapping (Option A)is the primary trigger for this. If the physical link or the underlying transport (like a leased line or a microwave link) goes down even momentarily, the OSPF process immediately detects the interface failure, flushes the neighbors, and moves the state to Down. As soon as the interface comes back up, the routers perform the Hello exchange and reach the Full state again, creating the flapping cycle.
                                          Analysis of other options:
                                          * MTU Mismatch (Option D):This typically causes the adjacency to get "stuck" in theExchangeor ExStartstate. The routers can exchange small Hello packets, but when they try to send larger Database Description (DBD) packets that exceed the MTU, the packets are dropped, preventing the session from ever reaching "Full."
                                          * Area ID Mismatch (Option C):This prevents the adjacency from even reaching theInitstate; the routers will never form a neighbor relationship.
                                          * Route Preference (Option B):This affects which route is chosen for the forwarding table but has no impact on the OSPF neighbor state machine itself.


                                          NEW QUESTION # 20
                                          Which BGP attribute is optional, transitive, and is passed unchanged to other BGP peers if not recognized?

                                          Answer: D

                                          Explanation:
                                          The Community attribute is an optional transitive BGP attribute. Optional transitive attributes are propagated to other BGP peers even if a router does not recognize them. The Community attribute is commonly used to tag routes so that routing policies can apply specific handling to those routes as they propagate through the network.


                                          NEW QUESTION # 21
                                          You are a network architect designing a brand new network. You want to deploy RSVP LSPs in this network. You are currently in the process of choosing whether to run OSPF or IS-IS as your interior gateway protocol.
                                          In this scenario, which two statements are correct about IGP traffic engineering extensions in an RSVP network? (Choose two.)

                                          Answer: B,C

                                          Explanation:
                                          When using IS-IS in an RSVP traffic engineering environment, traffic engineering extensions must be explicitly enabled so that IS-IS advertises TE information such as link bandwidth and administrative groups to build the traffic engineering database.
                                          When using OSPF, traffic engineering extensions must also be explicitly configured. Enabling OSPF traffic engineering allows the protocol to advertise TE attributes required by RSVP-TE and CSPF for calculating constrained paths.


                                          NEW QUESTION # 22
                                          Referring to the exhibit, how do you verify the status of the tunnel from R1?

                                          Answer: A

                                          Explanation:
                                          To verify the status of the tunnel from R1, you would issue a ping from the source address that is assigned to R1's end of the tunnel. In the exhibit, we can see that the tunnel interface (gre-
                                          0/0/0.0) has the IP address 198.51.100.1 on R1. Therefore, to test the tunnel's status, you should ping the IP address at the other end of the tunnel (which is likely the address on User B's interface or another interface on R2) from R1's tunnel source address.


                                          NEW QUESTION # 23
                                          ......

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