JN0-364資訊，JN0-364考題資源

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Juniper JN0-364 Exam Syllabus Topics:

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

                                          >> JN0-364資訊 <<

                                          Juniper JN0-364考題資源 - JN0-364題庫分享

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                                          最新的 JNCIS-SP JN0-364 免費考試真題 (Q113-Q118):

                                          問題 #113
                                          Click the Exhibit button.

                                          Which statement is correct about the configuration shown in the exhibit?

                                          答案：B


                                          問題 #114
                                          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.)

                                          答案：B,D

                                          解題說明：
                                          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.


                                          問題 #115
                                          Which two protocols are capable of distributing labels for segment routing? (Choose two.)

                                          答案：A,B

                                          解題說明：
                                          Segment routing labels can be distributed by link-state routing protocols such as IS-IS and OSPF, which have been extended to support segment routing capabilities.


                                          問題 #116
                                          How are routing loops prevented in external BGP networks?

                                          答案：C

                                          解題說明：
                                          BGP is apath-vector protocol, and its primary mechanism for ensuring a loop-free topology across the global internet is theAS_PATHattribute. This attribute is a "well-known mandatory" attribute that records every Autonomous System (AS) a prefix has passed through.
                                          According to Juniper Networks Service Provider documentation, the loop prevention rule forExternal BGP (EBGP)is straightforward: when a router receives a BGP Update from an EBGP peer, it examines the AS_PATH list. If the router's ownlocal AS numberis already present in the list, it indicates that the advertisement has already traversed the local AS and has returned. To prevent a routing loop, the routerwill not use the routeand will implicitly discard the update (Option D).
                                          This behavior is a default, hard-coded function of the BGP protocol and does not require the administrator to write manualrouting policies(Options B and C) to achieve basic loop prevention. While there are advanced features like as-path-expand or allow-as-in that can modify this behavior for specific design requirements (such as in certain Hub-and-Spoke MPLS VPN topologies), the standard operational default is to reject any route where the local AS is detected in the path. This ensures that traffic does not circulate infinitely between Autonomous Systems.


                                          問題 #117

                                          Referring to the exhibit, which protocol would automatically create a full mesh of label-switched paths between MPLS-enabled routers?

                                          答案：A

                                          解題說明：
                                          In Juniper Networks Junos OS, theLabel Distribution Protocol (LDP)is specifically designed to automate the creation of Label Switched Paths (LSPs) based on the information provided by the underlying Interior Gateway Protocol (IGP), such as OSPF or IS-IS. When LDP is enabled on a set of interfaces within an OSPF area (as shown in the exhibit with Area 0.0.0.0), it automatically discovers neighbors and exchanges label mappings for all known unicast routes in the routing table.
                                          The defining characteristic of LDP in this context is its "topology-driven" nature. Unlike RSVP (Resource Reservation Protocol), which typically requires the manual configuration of each LSP ingress point and destination, LDP follows the IGP's shortest path tree to automatically build afull meshof LSPs between all participating routers. This means that every Provider Edge (PE) and Provider (P) router in the exhibit-PE1, PE2, PE3, P1, P2, and P3-will establish label-switched connectivity to every other router without the administrator having to define individual tunnels.
                                          LDP accomplishes this through a downstream-unsolicited label distribution mode by default in Junos. Each router assigns a local label for its loopback address and other prefixes and advertises these to its neighbors.
                                          Because every router is performing this action for every reachable prefix in the OSPF domain, a complete fabric of label-switched paths is formed. While RSVP is more robust for traffic engineering and bandwidth reservation, LDP is the preferred protocol for creating a simple, scalable full mesh of LSPs for applications like Layer 3 VPNs or internal BGP tunneling where complex path manipulation is not required. BFD is a failure detection protocol, and BGP is used for service signaling, making LDP the only correct choice for automatic mesh creation.


                                          問題 #118
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