JN0-364日本語対策 & JN0-364科目対策

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Juniper JN0-364 Exam Syllabus Topics:

SectionObjectives
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- OSPF configuration and troubleshooting
          • 1. Adjacency and neighbor states
            • 2. Areas and LSAs
              - IS-IS operation in service provider networks
              • 1. LSP and SPF calculation
                • 2. Levels and routing hierarchy
                  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. Core, edge, and access architecture
                        • 2. Scalability considerations
                          MPLS and Service Provider Technologies- VPN services
                          • 1. Layer 3 VPN concepts
                            • 2. Layer 2 VPN overview
                              - MPLS fundamentals
                              • 1. LDP operations
                                • 2. Label switching and forwarding
                                  BGP and Routing Policy- BGP fundamentals
                                  • 1. Attributes and path selection
                                    • 2. eBGP and iBGP operations
                                      - Routing policy control
                                      • 1. Route filtering and manipulation
                                        • 2. Import/export policies

                                          >> JN0-364日本語対策 <<

                                          JN0-364科目対策、JN0-364受験練習参考書

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                                          Juniper Service Provider Routing and Switching, Specialist (JNCIS-SP) 認定 JN0-364 試験問題 (Q142-Q147):

                                          質問 # 142
                                          You are using EBGP to connect to two upstream peers in the same AS. You want to make one of the links less preferred for traffic entering your network from the peer's AS. Which feature should you use to achieve this goal?

                                          正解：D

                                          解説：
                                          In the world of BGP, controllinginbound traffic(traffic entering your network) is significantly more challenging than controlling outbound traffic because it requires influencing a decision made by an external Autonomous System (AS). According to Juniper Networks documentation, when you have multiple links to the same AS or even different ASes, the BGP path selection process is used by the upstream neighbor to decide which path to take to reach your prefixes.
                                          AS-Path Prependingis the standard technique used to make a path appear less attractive to external peers. By artificially lengthening the AS_PATH attribute on the BGP advertisements sent over a specific link, you exploit the BGP best-path algorithm rule that prefers a shorter AS path. When you prepend your own AS number multiple times to the update sent to the "less preferred" peer, that peer's BGP routers will see a longer path compared to the alternative link and will naturally prefer the shorter, unprepended route.
                                          It is important to distinguish why other options are incorrect for this specific goal:
                                          * Local Preference (Option D):This is a well-known discretionary attribute used to influenceoutbound traffic. It is not advertised to EBGP peers; therefore, your upstream neighbor cannot see your local preference settings.
                                          * Origin Code (Option B):While the origin code (IGP, EGP, or Incomplete) is a tie-breaker in the selection process, it is rarely used for traffic engineering and lacks the granular control provided by prepending.
                                          * Route Reflector (Option A):This is an Internal BGP (IBGP) scaling mechanism used to reduce the need for a full mesh of peers within an AS; it does not directly influence external path selection by an upstream provider.
                                          Junos OS allows you to easily implement prepending viarouting policiesapplied as an "export" policy to the EBGP neighbor. By using the as-path-prepend action within a policy term, you can selectively degrade a path's attractiveness to manage your inbound bandwidth.


                                          質問 # 143
                                          Click the Exhibit button.

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

                                          正解：B


                                          質問 # 144
                                          You are designing an MPLS network and want to ensure that traffic traverses an LSP between PE routers that follow an explicit path through the core. Which protocol would accomplish this task?

                                          正解：B

                                          解説：
                                          In a Juniper Networks MPLS environment, the selection of a signaling protocol depends heavily on the requirement for traffic engineering and path control. To satisfy the requirement for anexplicit path-where the network architect defines specific hop-by-hop routers that the traffic must traverse-theResource Reservation Protocol (RSVP)is the necessary choice.
                                          According to Juniper documentation, RSVP (specifically RSVP-TE) supports the use ofExplicit Route Objects (EROs). When you configure an LSP in Junos OS, you can define a path consisting of a series of IP addresses (strict or loose hops). RSVP then signals the LSP along that exact sequence of routers, reserving resources and establishing labels as it goes. This allows for precise control over the network's traffic patterns, enabling administrators to steer traffic away from congested links or toward specific high-bandwidth paths.
                                          In contrast,LDP (Label Distribution Protocol)(Option D) is a "best-effort" signaling protocol. LDP strictly follows the Interior Gateway Protocol (IGP) shortest path. It does not support explicit paths or traffic engineering constraints; it simply builds a "mesh" of labels based on the existing routing table.IS-IS(Option C) is an IGP used to populate the routing table and TED but does not signal labels.BGP(Option A) is used for service delivery (like L3VPNs) but relies on an underlying transport LSP (built by RSVP or LDP) to reach its next hop. Therefore, only RSVP provides the mechanism for explicit path manipulation.


                                          質問 # 145
                                          What information is determined by using the AS path attribute included in the BGP update message? (Choose two.)

                                          正解：A、B


                                          質問 # 146
                                          You are implementing traffic engineering in your MPLS network. You must ensure that the MPLS routes are used to traverse your network. Your solution should not affect IGP routes in your route tables.
                                          In this scenario, which traffic engineering setting will accomplish this behavior?

                                          正解：C

                                          解説：
                                          To ensure that MPLS traffic-engineered routes are used without affecting IGP routes in the route tables, the mpls-forwarding traffic engineering setting should be used. This setting allows MPLS to influence forwarding without changing the IGP route selection.


                                          質問 # 147
                                          ......

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