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Juniper JN0-364 Exam Syllabus Topics:

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

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                                          Juniper Service Provider Routing and Switching, Specialist (JNCIS-SP) Sample Questions (Q58-Q63):

                                          NEW QUESTION # 58
                                          What prevents routing loops in a single-area OSPF network?

                                          Answer: B

                                          Explanation:
                                          In OSPF, loop prevention within a single area is achieved through the fundamental nature of its link-state architecture. Unlike distance-vector protocols that rely on "routing by rumor," OSPF ensures that every router within an area maintains an identicalLink-State Database (LSDB). This database acts as a complete map of the network topology.
                                          Once the LSDB is synchronized, each router independently executes theShortest Path First (SPF) algorithm
                                          , which is formally known as theDijkstra algorithm. This mathematical process treats the local router as the
                                          "root" of a tree and calculates the shortest path to every other node (router) and prefix in the area based on the cumulative interface costs. Because every router uses the same synchronized map (the LSDB) and the same deterministic algorithm, they all arrive at a consistent, loop-free view of the best paths.
                                          According to Juniper Networks technical documentation, the Dijkstra algorithm is superior to theBellman- Ford algorithm(used by distance-vector protocols like RIP) in this regard. Bellman-Ford is susceptible to
                                          "count-to-infinity" problems and loops because routers only know the distance and direction to a destination provided by their neighbors, rather than the full topology. In OSPF, even if a link fails, the updated Link-State Advertisement (LSA) is flooded rapidly, and the Dijkstra algorithm is re-run to find a new loop-free path.
                                          Routing policies(Option B) are used to manipulate path selection or filter routes but are not the primary mechanism for fundamental loop prevention in OSPF. Similarly,forwarding policies(Option D) govern how traffic is handled at the data plane level rather than determining the control plane's loop-free topology.


                                          NEW QUESTION # 59
                                          Interface ge-0/0/0.0 connecls yout network to your ISP. You want to advertise this interface address as an Internal route In OSPF without creating a neighbor with your ISP.
                                          In this scenario, how is this task accomplished?

                                          Answer: C

                                          Explanation:
                                          When you want to advertise an interface in OSPF but not form an OSPF adjacency over that interface (for example, towards an ISP), you can configure the interface as passive. This will advertise the network on the interface in OSPF without sending OSPF hello packets or forming OSPF neighbor relationships on that interface.


                                          NEW QUESTION # 60
                                          You are asked to configure the OSPF environment to prevent the DRother routers from participating in DR/BDR election.
                                          Referring to the exhibit, which command will accomplish this task?

                                          Answer: A

                                          Explanation:
                                          To prevent a router from participating in the OSPF designated router (DR) and backup designated router (BDR) election process, you set the OSPF priority to 0 on the interfaces of that router. This tells OSPF that the router on those interfaces is not to be considered for election as either DR or BDR, effectively making them DRother routers. The exhibit indicates that this is the desired configuration, and therefore the correct command to issue on the Juniper device would be to set the priority to 0 on the relevant interfaces.


                                          NEW QUESTION # 61
                                          Referring to the exhibit, you have an established RSVP LSP between R1 and R4 when you experience a link failure between R2 and R3.
                                          Which two statements are correct? (Choose two.)

                                          Answer: C,D

                                          Explanation:
                                          Upon a link failure in an RSVP-signaled LSP, the router upstream of the failure (R2) sends a PathTear message upstream to the ingress router (R1), and the router downstream of the failure (R3) sends a ResvTear message downstream to the egress router (R4). These messages signal the failure and initiate tear down of the LSP state in the respective directions.


                                          NEW QUESTION # 62
                                          Click the Exhibit button.

                                          Referring to the exhibit, R1 and R2 are configured to run IS-IS. The IS-IS adjacency between R1 and R2 is up.
                                          What does the output of the show isis interfacecommand tell you about R1?

                                          Answer: D

                                          Explanation:
                                          The interface output shows Level 1 is disabled on ge-0/0/0.0 while Level 2 is operating as point- to-point. This indicates R1 is forming only a Level 2 IS-IS adjacency with R2 on that link.


                                          NEW QUESTION # 63
                                          ......

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