JN0-364試験の準備方法｜ハイパスレートのJN0-364日本語対策試験｜実用的なService Provider Routing and Switching, Specialist (JNCIS-SP)専門試験

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Juniper JN0-364 Exam Syllabus Topics:

SectionObjectives
Topic 1: Open Shortest Path First (OSPF)- Identify the concepts, operation, or functionality of OSPF
  • 1. Adjacencies and neighbors
  • 2. OSPF area and router types
  • 3. OSPF packet types
  • 4. Link-state advertisement (LSA) packet type
  • 5. Link-state database
  • 6. Designated router and backup designated router
  • 7. Router ID
- Demonstrate knowledge of how to configure, monitor, or troubleshoot OSPF
  • 1. Interfaces and neighbor
  • 2. Routing policy application
  • 3. Troubleshooting tools
Topic 2: IPv6- Identify the concepts, operation, or functionality of IPv6
  • 1. IPv6 over IPv4 tunneling
  • 2. Static routes
  • 3. Dynamic routing - OSPFv3, IS-IS, BGP
- Demonstrate knowledge of how to configure, monitor, or troubleshoot IPv6
Topic 3: Border Gateway Protocol (BGP)- Identify the concepts, operation, or functionality of BGP
  • 1. Attributes
  • 2. BGP message types
  • 3. IBGP and EBGP functionality and interaction
  • 4. BGP basic operation
  • 5. BGP route reflection and confederations
  • 6. Route selection process
- Demonstrate knowledge of how to configure, monitor, or troubleshoot BGP
  • 1. Routing policy application
  • 2. Troubleshooting tools
  • 3. Peers and peer groups
Topic 4: Layer 2 Bridging or VLANs- Identify the concepts, benefits, or functionality of VLANs
  • 1. Tagging
  • 2. Integrated Routing and Bridging (IRB)
  • 3. Port modes
- Demonstrate knowledge of how to configure, monitor, or troubleshoot Layer 2 bridging or VLANs
  • 1. VLANs
  • 2. IRB
  • 3. Interfaces and ports
  • 4. Provider bridging
- Identify the concepts, operation, or functionality of Layer 2 bridging for the Junos OS
  • 1. Frame processing
  • 2. Bridging elements and terminology
  • 3. Virtual Switches
  • 4. Service provider switching platforms
  • 5. Provider bridging (Q-in-Q tunneling)
Topic 5: Spanning Tree Protocols- Identify the concepts, operation, or functionality of STP
  • 1. RSTP
  • 2. VSTP
  • 3. STP
  • 4. MSTP
- Demonstrate knowledge of how to configure, monitor, or troubleshoot Spanning Tree Protocols
  • 1. RSTP
  • 2. VSTP
  • 3. STP
  • 4. MSTP
Topic 6: Intermediate System to Intermediate System (IS-IS)- Demonstrate knowledge of how to configure, monitor, or troubleshoot IS-IS
  • 1. Interfaces and adjacencies
  • 2. Routing policy application
  • 3. Troubleshooting tools
- Identify the concepts, operation, or functionality of IS-IS
  • 1. Adjacencies and neighbors
  • 2. Levels and areas
  • 3. Designated intermediate system (DIS)
  • 4. IS-IS protocol data units (PDUs)
  • 5. Type, length, values (TLVs)
  • 6. Link-state database
  • 7. Metrics
Topic 7: Multiprotocol Label Switching (MPLS)- Identify the concepts, operation, or functionality of MPLS CoS processing on Junos devices
  • 1. Segment routing with MPLS
  • 2. End-to-end packet flow and forwarding
  • 3. MPLS terminology
  • 4. MPLS and routing tables
  • 5. RSVP
  • 6. MPLS packet header
  • 7. LDP
  • 8. Labels and the label information base
- Demonstrate knowledge of how to configure, monitor, or troubleshoot MPLS
  • 1. LDP-signaled Label-Switched Paths (LSPs)
  • 2. Shortest path segment-routing LSPs
  • 3. MPLS forwarding
  • 4. RSVP-signaled Label-Switched Paths (LSPs)
Topic 8: Protocol-Independent Routing- Identify the concepts, operation, or functionality of various protocol-independent routing components
  • 1. Load balancing
  • 2. Static, aggregate, and generated routes
  • 3. Filter-based forwarding
  • 4. Martian addresses
  • 5. Routing instances, including routing information base (RIB) (also known as routing table) group
- Demonstrate knowledge of how to configure, monitor, or troubleshoot various protocol-independent routing components
  • 1. Load balancing
  • 2. Static, aggregate, and generated routes
  • 3. Filter-based forwarding

>> JN0-364日本語対策 <<

JN0-364試験の準備方法｜信頼的なJN0-364日本語対策試験｜認定するService Provider Routing and Switching, Specialist (JNCIS-SP)専門試験

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Juniper Service Provider Routing and Switching, Specialist (JNCIS-SP) 認定 JN0-364 試験問題 (Q28-Q33):

質問 # 28
Which IPv6 extension header is used to specify intermediate nodes for a packet's path?

正解：A

解説：
In the IPv6 architecture, the base header is kept at a fixed size of 40 bytes to streamline processing. Any additional features or options are handled byExtension Headers, which are inserted between the IPv6 header and the upper-layer protocol. According to Juniper Networks technical documentation and RFC 8200, when a source node needs to list one or more intermediate nodes to be "visited" on the way to the final destination, it utilizes theRouting extension header (Option B).
The Routing header is functionally similar to the "Source Route" option in IPv4. When a packet contains a Routing header, it is addressed to the first intermediate node listed in the header. That node examines the header, swaps its own address with the next address in the list, and forwards the packet. This process continues until the packet reaches the final destination. This is a foundational component for technologies like Segment Routing over IPv6 (SRv6), where the Routing header (specifically the Segment Routing Header or SRH) is used to steer traffic through a specific set of service instructions or nodes.
To distinguish this from the other options:
* Hop-by-hop options (Option A):These carry information that must be examined byeverynode along the path (such as Router Alert), not just specific intermediate nodes.
* Fragment (Option C):This is used only when the source node needs to fragment a packet that exceeds the path MTU.
* Destination options (Option D):These carry optional information intended specifically for the destination node (or nodes listed in a Routing header), but they do not dictate the path themselves.


質問 # 29
By default, which router in an MPLS LSP removes the PLS header?

正解：A


質問 # 30
What are three types of MPLS routers? (Choose three.)

正解：B、C、E

解説：
In an MPLS network, the types of routers include ingress routers (where the MPLS labels are first applied), egress routers (where MPLS labels are removed), and transit routers (which switch MPLS- labeled packets through the MPLS network). Peering routers and aggregation routers are not specific types of MPLS routers; they are general network terms.


質問 # 31
Referring to the exhibit. You are advertising a summary route that represents your local network (172.20.0.0716) to both ISP A and ISPB. You want to influence all traffic sent to you from ISP C to go through R2.
How would you accomplish this task?

正解：D

解説：
To influence ISP C to prefer the path through R2 for the 172.20.0.0/16 network, R2 should make its path less preferable to ISP B by prepending its AS number multiple times. This makes the path through R2 appear longer and less desirable to ISP C, which would receive these updates from ISP B. AS path length is a well-known attribute in BGP and is used to determine the best path; paths with a longer AS path are considered less preferable.


質問 # 32
How are routing loops prevented in external BGP networks?

正解：B

解説：
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.


質問 # 33
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