Juniper JN0-364 PDF Questions Exam Preparation and Study Guide

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Juniper JN0-364 Exam Syllabus Topics:

SectionObjectives
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. LSP and SPF calculation
        • 2. Levels and routing hierarchy
          MPLS and Service Provider Technologies- MPLS fundamentals
          • 1. LDP operations
            • 2. Label switching and forwarding
              - VPN services
              • 1. Layer 3 VPN concepts
                • 2. Layer 2 VPN overview
                  Service Provider Architecture & Junos Fundamentals- Service provider network design basics
                  • 1. Scalability considerations
                    • 2. Core, edge, and access architecture
                      - Junos OS routing fundamentals
                      • 1. Routing table and forwarding concepts
                        • 2. Junos CLI and configuration hierarchy
                          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
                                  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

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                                          Juniper Service Provider Routing and Switching, Specialist (JNCIS-SP) Sample Questions (Q49-Q54):

                                          NEW QUESTION # 49
                                          You are bringing a new network online with three IS-IS routers using default Junos election priorities. The routers are configured as Level 2 only IS-IS routers. Which statement is true about the DIS election in this scenario?

                                          Answer: A

                                          Explanation:
                                          A router's priority for becoming the designated router is indicated by an arbitrary number from 0 through 127, which you configure on the IS-IS interface. The router with the highest priority becomes the designated router for the area (Level 1, Level 2, or both), also configured on the IS- IS interface. If routers in the network have the same priority, then the router with the highest MAC address is elected as the designated router. By default, routers have a priority value of 64.


                                          NEW QUESTION # 50
                                          Referring to the exhibit. Which type of load balancing is shown in the exhibit?

                                          Answer: B

                                          Explanation:
                                          The policy statement shown in the exhibit has a term that specifies load-balance per-packet, which indicates that per-packet load balancing is being used. This means that the routing device will distribute packets out multiple paths on a per-packet basis, rather than on a per-flow (per- destination or per-source-destination pair) basis.


                                          NEW QUESTION # 51
                                          You are asked to configure an RSVP LSP.
                                          Under which hierarchy is this configuration performed?

                                          Answer: A

                                          Explanation:
                                          RSVP-signaled LSPs are configured under the protocols mpls hierarchy in Junos OS. The label- switched-path configuration that defines the LSP parameters, destination, bandwidth, and path options is placed under this hierarchy, while the protocols rsvp hierarchy is used only to enable and control RSVP signaling on interfaces.


                                          NEW QUESTION # 52
                                          What information is determined by using the AS path attribute included in the BGP update message? (Choose two.)

                                          Answer: C,D

                                          Explanation:
                                          TheAS_PATHattribute is a "well-known mandatory" attribute in BGP, meaning it must be present in every BGP Update message exchanged between External BGP (eBGP) peers. It records the sequence of Autonomous System numbers that a route has traversed. Per Juniper Networks Service Provider documentation, this attribute serves two fundamental purposes:
                                          1. Loop Prevention (Option B):
                                          This is the most critical function of the AS_PATH. When a BGP router receives an update from an eBGP peer, it scans the AS_PATH attribute for its own AS number. If the router finds its local AS number already listed in the path, it concludes that the route has already passed through its network and has "looped" back. To prevent an infinite routing loop, the router will immediately discard the update. This mechanism is the cornerstone of BGP's stability as a path-vector protocol.
                                          2. Path Selection / Shortest Path Determination (Option C):
                                          BGP uses a complex "tie-breaking" algorithm to select the best path among multiple candidates. One of the highest-ranking criteria in this algorithm (after Weight, Local Preference, and AS_PATH length) is the length of the AS_PATH. A shorter AS_PATH (fewer AS numbers listed) is generally preferred over a longer one, as it typically represents a more direct path through the internet hierarchy.
                                          Why other options are incorrect:
                                          * Option A:The "origin" of a route (IGP, EGP, or Incomplete) is determined by theORIGINattribute, which is a separate well-known mandatory attribute.
                                          * Option D:BGP does not count individual "next-hop devices" (which would be an IGP metric like hop count in RIP); it only tracks Autonomous Systems. A single AS in the path might contain hundreds of internal routers (next-hops), but BGP only sees it as one "hop" in the AS_PATH.


                                          NEW QUESTION # 53
                                          You are configuring BGP for IPv6 operations.
                                          In this scenario, which two statements are correct? (Choose two.)

                                          Answer: A

                                          Explanation:
                                          BGP uses a router ID that is always a 32-bit value, even when BGP is operating for IPv6 address families.
                                          BGP supports both 16-bit and 32-bit Autonomous System Numbers through the use of four-byte ASN extensions, allowing ASNs to be represented using a 32-bit value.


                                          NEW QUESTION # 54
                                          ......

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